ASUS ZenFone 2 Deluxe (ZE551ML) Others Drivers

USB

ASUS_Android_USB_drivers_for_Windows Download

Utilities

Webview v.55 Solved 12306 APP blank payment screen issue Download

Firmware

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V4.21.40.223 for WW SKU only* (andriod M) Improvement Item:
1)Improve Wi-Fi/Bluetooth stability  
2)Update Security patch
3)Improve system stability 
4)Support India SOS call (India only)

Steps of Update:
1.Check software version of your device**
2.Download device software and Update SOP (From “Manual” Item)
3.Only apply to same SKU update, Example: WW->WW, CN->CN, .
4.Software update cannot transfer the software SKU and downgrade the software version.
5.Wrong SKU may cause update failure, please update the same SKU version only.

*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V4.21.40.184 for WW SKU only* (andriod M) Improvement Item:

1)Improve system stability 
2)Improve bluetooth stability
3)Improve ZenMotion related issue

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.198 for WW SKU only* (andriod L) Improvement Item:
1)Update security patch
2)Improve system stability
3)Slove multiple region calling problem

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V4.21.40.144 for Brasil area users only* (andriod M) Note:
This firmware is avaible for Brasil area users only to update to Andriod M.

Please make sure update to latest Andriod L (2.20.40.184) before update to Andriod M
1)APP2SD not supported in M. Please backup before upgrade.
2)Adjust pre-load app after upgrade to Android M
3) Multi-user and SnapView will not be supported. If you wish to continue to use multi-user, please keep using current account
4)Remove Asus Email, Asus Calendar, Asus Messaging, Asus Browser and Asus Music after Factory Reset. You could use Gmail, Google Calendar, Google Messenger, Chrome and Google Play Music for relevant services
5)Add new features and new apps:
- Google Calendar
- Google Messenger
- Facebook
- Facebook messenger
- Instagram
The apps listed below will no longer be pre-loaded once your device has been upgraded to Android 6.0 (Marshmallow).
Thanks for your support.
1. ASUS Backup
2. Data Transfer
3. Dr. Eye (TW SKU)
4. Jawbone UP
5. EZTABLE (TW SKU)
6. Google Play Books
7. Google Play Games
8. Google Play Newsstand
9. Google+
10. Mirror
11. Omlet
12. Party Link
13. PC Link
14. Photo Frame
15. Remote Link
16. TripAdvisor
17. What's Next
18. Yahoo Shopping (TW SKU)
19. ZenFlash (Can be downloaded from Google play)
20. Zinio
21. Asus Game center


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.197 for JP SKU only* (andriod L) Improvement Item:

1)Update security patch
2)Update ASUSZenUIServices
3)Slove multiple region calling problem

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.197 for CN SKU only* (andriod L) 1)Update security patch
2)Update ASUSZenUIServices
3)Slove multiple region calling problem

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: VWW-2.20.40.196 for WW SKU only* (andriod L) Improvement Item:

1)Update security patch
2)Update ASUSZenUIServices
3)Remove 3rd party app (WW: Clean Master, CM Security,  TW: EZ訂)
4)Slove multiple region calling problem

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: CUCC-2.20.40.197(andriod L) for CUCC SKU only* 1)Update security patch
2)Update ASUSZenUIServices
3)Slove multiple region calling problem

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1.Check software version of your device**
2.Download device software and Update SOP (From “Manual” Item)
3.Only apply to same SKU update, Example: WW->WW, CN->CN, .
4.Software update cannot transfer the software SKU and downgrade the software version.
5.Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.195 for JP SKU only* Improvement Item:
1)Fix APP2SD issue
2)Update public warning system
3)decrease volume of shutter sound at JP sku.

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.195(andriod L) for CUCC SKU only* Improvement Item:

1)Update Bluetooth FW
2)Fix APP2SD issue
3)Remove 3rd party app (CN:猎豹清理大师)

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1.Check software version of your device**
2.Download device software and Update SOP (From “Manual” Item)
3.Only apply to same SKU update, Example: WW->WW, CN->CN, .
4.Software update cannot transfer the software SKU and downgrade the software version.
5.Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.195 for CN SKU only* (andriod L) Improvement Item:

1)Update Bluetooth FW
2)Fix APP2SD issue
3)Remove 3rd party app (CN:猎豹清理大师)

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1.Check software version of your device**
2.Download device software and Update SOP (From “Manual” Item)
3.Only apply to same SKU update, Example: WW->WW, CN->CN, .
4.Software update cannot transfer the software SKU and downgrade the software version.
5.Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.185 for CUCC SKU only* Improvement Item:

1)Update Bluetooth FW
2)Fix APP2SD issue

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.185 for CN SKU only* Improvement Item:

1)Update Bluetooth FW
2)Fix APP2SD issue

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.185 for JP SKU only* Improvement Item:

1)Update BLE FW
2)Fix APP2SD issue

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image:2.20.40.184 for WW SKU only* Improvement Item:

1)Update Bluetooth FW
2)Fix APP2SD issue

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image:2.20.40.183 for WW SKU only* Improvement Item:

1)Improve Power Save mode
2)improve system stability
3) Add CM Security app – Protect your devices from virus, malicious ads, or spyware. Use CM Security for your premium protection.
4)Remove Dr.Safety
5)Add ZenChoice - Your All-in-One app solutions platform to enrich your device's functionality.
6)Remove Asus Email after Factory Reset. You can use Gmail for relevant services.

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.183 for JP SKU only* Improvement Item:

1)Improve Power Save mode
2)improve system stability
3)Improve power consumption of SIM2

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.183 for CUCC SKU only* Improvement Item:
1)Improve Power Save mode
2)improve system stability
3)Improve power consumption of SIM2

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.183 for CN SKU only* Improvement Item:

1)Improve Power Save mode
2)improve system stability
3)Improve power consumption of SIM2

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.174 for JP SKU only* Improvement Item:

Fixed internal storage abnormal issue

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.97 for WW SKU only* Improvement Item:

Fixed internal storage abnormal issue

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: 2.20.40.160 for WW SKU only* Improvement Item:

Update ASUS ZenUI Launcher App

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.159 for CN SKU only* Improvement Item:
1)Fixed icon display issue
2)Fix CN string issue

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1.Check software version of your device**
2.Download device software and Update SOP (From “Manual” Item)
3.Only apply to same SKU update, Example: WW->WW, CN->CN, .
4.Software update cannot transfer the software SKU and downgrade the software version.
5.Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.159 for CUCC SKU only* Improvement Item:

1)Several Apps update
2)Fix icon display issue in Settings
3)Improve the stability of Snap View
4)Improve the stability of Lockscreen
5)Improve the stability of Camera
6)Fixed WiFi Hotspot issue
7)Fixed Data transmission issue
8)Fixed Bluetooth transmission issue
9)Fixed SD card related issue
10)Extend the shutdown mimunes by power key press.
11)Improve the compatibility of apps

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.150 for CN SKU only* Improvement Item:

1.Several Apps update
2.Fix icon display issue in Settings
3.Improve the stability of Snap View
4.Improve the stability of Lockscreen
5.Improve the stability of Camera
6.Fixed WiFi Hotspot issue
7.Fixed Data transmission issue
8.Fixed Bluetooth transmission issue
9.Fixed SD card related issue
10.Extend the shutdown mimunes by power key press.
11.Improve the compatibility of apps

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1.Check software version of your device**
2.Download device software and Update SOP (From “Manual” Item)
3.Only apply to same SKU update, Example: WW->WW, CN->CN, .
4.Software update cannot transfer the software SKU and downgrade the software version.
5.Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.139 for WW SKU only* Improvement Item:

1.Improve screen turn into black during phone call issue.
2.Fix Miracast frame rate drop issue.
3.Fix NFC connect issue.
4.Fix network data warning notice don not come up issue
5.FixWi-Fi conncet issue
6.Fix 3G cannot camp to H plus in Laos and Paraguay issue.
7.Fix the coming call issue when using bluetooth earphone.
8.Fix Unlock Tool issue.
9.Improve service stability of modem
10.Fix the charging issue of roaming to LTE when data roaming option disabled
11.Fix boost stability issue
12.Fix the issue that user would still receive the notifications from Auto start denied Apps
13..Fix ASUS Mobile Manager data usage restriction issue
14.Fix ZenMotion Shake Shake screenshot issue
15.Fix URL recognition issue in Messages
16.Modify HK Chinese strings
17.Fix IME issue when open Yahoo PC version webpage by ASUS Browser
18.Fix countdown alarm issue after set in Snap View
19.Fix string issue in Theme Apps
20.Fix charge remained time display issue when quick charging
21.Fix SIM PIN lock issue in Cover View
22.Modify Quick charge notification UI layout
23.Fix System UI stability issue
24.Fix Power saver settings issue
25.Fix JP FlipFont issue
26.Fix Battery Simplified Chinese string issue
27.Fix ASUS Mobile Manager data usage calculation issue
28.Improve Auto Start Manager stability
29.Remove BookLive from JP SKU
30.Fix Documents UI stability issue
31.Fix Snap View UI issue and improve its performance when install 3rd party apps
32.Improve Hand Writing accuracy
33.Fix flashlight turn-off issue when double tap power key
34.Fix Power Saver Ultra saving mode notification settings issue

New Features:

1.Add phone number editing function in Dual SIM settings.
2.Add 128G SD card turn into Power Saver mode function.
3.Add Latvian and Lithuanian languages.


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.104 for CUCC SKU only* Improvement Item:

1. Improve stability of Modem
2. Fixed device comes up error message when inserting SD card issue



For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.104 for CN SKU only* Improvement Item:

1. Improve stability of Modem
2. Fixed device comes up error message when inserting SD card issue



For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.102 for CUCC SKU only* Improvement Item:

1. Improve stability of Modem



For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.102 for CN SKU only* Improvement Item:

1. Improve stability of Modem



For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.97 for JP SKU only* Improvement Item:

1. Fix Power and Boost duplicated icon issue
2. Fix System UI randomly crash issue when in Turkish language
3. Fixed the display issue after answering a call.
4. Fixed the issue that photo will be yellowish when use flash .
5. Improve stability of modem
6. Improve memory usage

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading.

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.100 for CN SKU only* Improvement Item:

1. Improve stability of Modem
2. Improve speed of returning back to LTE after Call


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.100 for CUCC SKU only* Improvement Item:

1. Improve stability of Modem
2. Improve speed of returning back to LTE after Call


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.97 for CUCC SKU only* Improvement Item:

1. Fix Power and Boost duplicated icon issue
2. Fix System UI randomly crash issue when in Turkish language
3. Fixed the display issue after answering a call.
4. Fixed the issue that photo will be yellowish when use flash .
5. Improve stability of modem
6. Improve memory usage
7. Fix the delay issue in displaying icons on Launcher
8. Fix System UI PS icon issue for CUCC spec alignment


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.97 for CN SKU only* mprovement Item:

1. Fix Power and Boost duplicated icon issue
2. Fix System UI randomly crash issue when in Turkish language
3. Fixed the display issue after answering a call.
4. Fixed the issue that photo will be yellowish when use flash .
5. Improve stability of modem
6. Improve memory usage
7. Fix the delay issue in displaying icons on Launcher
8. Fix System UI PS icon issue for CUCC spec alignment


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.97 for WW SKU only* Improvement Item:

1. Fix Power and Boost duplicated icon issue
2. Fix System UI randomly crash issue when in Turkish language

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.90 for WW SKU only* Improvement Item:

1. Fixed the display issue after answering a call.
2. Fixed the issue that photo will be yellowish when use flash.
3. Improve stability of modem
4. Fixed Quick charging issue
5. Dim the lowest brightness level in Manual mode
6. Improve memory usage

New Feature:
1. Power Saver:
NEW Power saver UI
Added Battery mode detail pages
Added Customized modes
2. Auto start Manager:
Add “Clean up in suspend” function. (If user use the app which already deny from auto-starting, the app will be clean up after display off.)
Provide ZenUI Apps for user to deny from auto-starting.
3. ASUS Mobile Manager:
Add “Power & Boost” function.
Add the Battery and Memory layout.


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.63 for WW SKU only* Improvement Item:

1. Fixed baterry display error issue.
2. Fixed the issue which is about sliding to answer and hanging up the call.
3. Improve the call stability.
4. Improve the compatibility for some APP.
5. Improve the fluency of using the camera.



For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.63 for CN SKU only* Improvement Item:

1. Fixed baterry display error issue.
2. Fixed the issue which is about sliding to answer and hanging up the call.
3. Improve the call stability.
4. Improve the compatibility for some APP.
5. Improve the fluency of using the camera.



For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.61 for CN SKU only* Improvement Item:

1. Fixed baterry display error issue.
2. Fixed the issue which is about sliding to answer and hanging up the call.
3. Improve the call stability.


New Features
1. Add Hands up
As phone is ringing, hold phone in portrait mode and lift to touch the ear to answer the phone.
2. Added Mobile Manager app which has six major functions:
- Data usage: Controls the apps' data usage
- Notifications: Manages annoying notifications
- Auto-start Manager: Manages auto-start apps running in the background
- Boost: Boosts memory
- Power Saver: Provides various battery modes to extend the battery life
- Virus Scanner: Scans virus and malwares
3. Add Flip cover function
Add new Clock theme
Add VIP icon in Clock view for SMS/email/missed call
Add timer reminder
Add charging reminder
4. Add Cover View function
New clock theme
Allows detail checking of everyday events in Calendar view
Supports Spotify on Music app


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software
Image: V2.20.40.59 for CN SKU only* Improvement Item:

1. Fix WIFI info sync-up issue
2. Improve System UI and lock screen stability
3. Improve Launcher App stability
4. Fix Alarm function issue after set up in Snap View mode
5. Improve Task Manager
6. Optimize Multi user and Do not disturb mode function
stability
7. Fix camera sphere panorama issue
8. Improve Auto Start Manager stability
9. Fixed when AC removed, UI still shows in charge mode.
10. Fixed Cisco Anywhere VPN connectin fail issue
11. Fix Wi-Fi hot spot MAC address
12. Fixed issue that noise comes out when use earphone.
13. Fixed vibrate function fail.
14. Fixed NFC can not auto connect to BT earphone.
15. Fixed can't transfer files through NFC(android beam)
16. Fixed can't use Kingston 32G SD
17. Fixed auto enable MTP issue.
18. Fixed Screen won't turn on after hang off the phone.
19. Fixed Wi-Fi hot spot can not be access by Xbox360
20. Fixed 4G internet issue.
21. Fixed internet icon disappear issue.
22. Fixed charge issue.
23. Implement Android security patch for Stagefright
24. Fixed tha issue: In vibrate mod, the ringtone is too
loud by using headphones.
25. Fixed Puzzle & Dragons crash issue.


New Features
1. Add Hands up
As phone is ringing, hold phone in portrait mode and lift to
touch the ear to answer the phone.
2. Added Mobile Manager app which has six major functions:
- Data usage: Controls the apps' data usage
- Notifications: Manages annoying notifications
- Auto-start Manager: Manages auto-start apps running in the
background
- Boost: Boosts memory
- Power Saver: Provides various battery modes to extend the
battery life
- Virus Scanner: Scans virus and malwares
3. Add Flip cover function
Add new Clock theme
Add VIP icon in Clock view for SMS/email/missed call
Add timer reminder
Add charging reminder
4. Add Cover View function
New clock theme
Allows detail checking of everyday events in Calendar view
Supports Spotify on Music app


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual
” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN,
.
4. Software update cannot transfer the software SKU and
downgrade the software version.
5. Wrong SKU may cause update failure, please update the
same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup
your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.20.40.59 for WW SKU only* Improvement Item:

1. Fix WIFI info sync-up issue
2. Improve System UI and lock screen stability
3. Improve Launcher App stability
4. Fix Alarm function issue after set up in Snap View mode
5. Improve Task Manager
6. Optimize Multi user and Do not disturb mode function stability
7. Fix camera sphere panorama issue
8. Improve Auto Start Manager stability
9. Fixed when AC removed, UI still shows in charge mode.
10. Fixed Cisco Anywhere VPN connectin fail issue
11. Fix Wi-Fi hot spot MAC address
12. Fixed issue that noise comes out when use earphone.
13. Fixed UI shows only can making emergency call issue
14. Fixed vibrate function fail.
15. Fixed NFC can not auto connect to BT earphone.
16. Fixed can't transfer files through NFC(android beam)
17. Fixed can't use Kingston 32G SD
18. Fixed auto enable MTP issue.
19. Fixed Screen won't turn on after hang off the phone.
20. Fixed no show PCCW issue.
21. Fixed Wi-Fi hot spot can not be access by Xbox360
22. Fixed 4G internet issue.
23. Fixed ID operator can't get H+ issue
24. Fixed internet icon disappear issue.
25. Fixed charge issue.
26. Implement Android security patch for Stagefright
27. Fixed tha issue: In vibrate mod, the ringtone is too loud by using headphones.
28. Fixed Puzzle & Dragons crash issue.

New Features
1. Add Hands up
As phone is ringing, hold phone in portrait mode and lift to touch the ear to answer the phone.
2. Added Mobile Manager app which has six major functions:
- Data usage: Controls the apps' data usage
- Notifications: Manages annoying notifications
- Auto-start Manager: Manages auto-start apps running in the background
- Boost: Boosts memory
- Power Saver: Provides various battery modes to extend the battery life
- Virus Scanner: Scans virus and malwares
3. Add Flip cover function
Add new Clock theme
Add VIP icon in Clock view for SMS/email/missed call
Add timer reminder
Add charging reminder
4. Add Cover View function
New clock theme
Allows detail checking of everyday events in Calendar view
Supports Spotify on Music app


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.19.40.21 for JP SKU only* Improvement Item:

1. Improve image quality.
2. Improve call stability and speed.
3. Improve call stability
4. Improve HWID stability
5. Improve modem stability
6. Improve signal bar stability
7. Modify the display of Operator name add network type when user search the network manually
8. Fixed the issue that the dialing number will change after calling out.
9. Fixed the audio sound maybe lag when using headset issue.
10. Fixed HW overlay issue- the screen has been shut down (enlarge and turn right )while watching video with google link through LINE.
11. Fixed bluetooth is easy to disconnect issue.
12. Fixed low voice issue with headset issue
13. Fixed music lag while receving text by using headset.
14. Fixed video appears abnormal issue through playing with LINE (or other app)
15. Fixed sound interference issue while using headset
16. Fixed the shup down issue with google app
17. Fixed SIM2 delay receiving issue
18. Fix personal hotsopt issue
19. Fixed some APP cannot show the correct baterry capacity issue.
20. Fixed instant camera sometimes fail issue.
21. Fixed the browser issue.
22. Improve AWB.
23. Fixed system will reboot issue
24. Fixed 3rd party app "FolderSync" issue
25. Fixed the camera APP cause power problems.
26. Fixed bug (NBA GAME TIME) will crash when playing the video.
27. Increase volume for receiver.
28. Fixed do not vibrate when android mode is incall issue.
29. Fixed SD card powered mechanism issue.
30. Fixed Wifi disconnect after long time suspend.
31. Improve camera quality.
32. Adjust the photo color & light when use LED flash.
33. Adjust the image exposure value
34. Using HW encode for 4G SKU.
35. Fixed some charging isuue
36. Fix the issue that sometimes HDR mode’s 6M & 8M resolution will have green line.
37. Improve the video recording quality.
38. Improve signal bar stability for sim 2
39. Fixed camera can not open sometimes when using zenflash
40. Improve volume of recording video will increase and decrease alternately.
41. Fixed FM Radio volume becomes large when using other app or lock screen.
42. Fixed some BLE device can not auto reconnect.
43. Fix location picker crash issue when attaching location info by Messaging
44. Fix Live Wallpaper settings issue when in landscape mode
45. Improve Camera App stability.
46. Reduce the occurrence of the issue that words sometimes fail to come out when typing.
47. Shorten the connected time.
48. Fix outgoing call problems when using back key
49. Fix "No SIM or SIM error" issue when calling the phone number starting with 911, 112
50. Fixed crash bug when sharing photos via Facebook
51. Fix wallpaper was been enlarged issue.
52. Fixed the issue which allows only priority interruptions mode turn into always interrupt mode when volume down.
53. Fixed flip cover cannot support KKBOX issue.
54. The Home button needs to be pressed twice in order to swich off while using apps.
55. Fixed the issue which shows up others app when swiching off contacts
56. Fixed Fresh Green cannot be used by ASUS UI issue
57. Add max CPU and Memory information
58. Improve in call screen UI performance
59. Fix the failure of recording the chosen ringtone in SD
60. Improve PC Link App stability
61. Fix Wi-Fi Settings show 2 Wi-Fi AP as connected
62. Fix several system UI and Lockscreen issues
63. Fix android.process.acore crash when launch FB
64. Fix WIFI setting which cannot memorise
65. Fix the slient mode issue
66. Resolve the issue which the talk time turns zero while the call record is cleared.
67. Fix zenmotion can be actived even the function was cloased.
68. Fix Interruption mode ringtone issue
69. Fix the "prevent the device from being waked up" issue
70. Fix the Ultra Saving mode issues
71. Fix Cover View Calendar issue
72. Improve double tap suspend performance.
73. Improve Power/ Battery UI
74. Improve Browser WebView compatibility
75. Fixed apps crashing due to Android System Webview update issue.
76. Add Auto start manager shortcut on home
77. Change Quick Memo to Auto start manager as default in Quick settings
78. Use Google Search Widget on Default Home Screen
79. Flip Cover- Add 3 clock themes/Add 3 clock themes
80. Improve Calendar App stability
81. Fix Calling screen flow issue when make calls by both SIM1 and SIM2
82. Fix the Do not disturb mode issue that "Allow only priority interruption" would be back to default settings after reboot
83. ASUS Power Saver-
* Provide variety of power saving mode for users to choose
* Auto change to Ultra saving mode when low battery
* Add Auto switch mode
84. Fix MyASUS stability issue
85.Improve the SIM icon in system UI.
86. Fix the issues of wallpaper installation failure through Dropbox
87. Improve Music App stability
88. Fix several issues in Settings
89. ASUS Support UI improvement
90. Improve Sound recorder stability
91. Improve Power saver stability and fix WIFI connect state issue in advanced settings
92. Improve Auto Start Manager stability and fix the App continuous pushed notification issue after restricting its auto start
93. The notice shows up while the first message comes only
94. Quick Settings: Change "Reading Mode" button as "Bluelight filter"
95. Improve System UI stability and modify Japanese strings
96. Fix Homescreen Wallpaper randomly disappear and half black screen issue
97. Add reset Snap View password function
98. Fix Contacts search failure issue when language was set as HK Chinese
99. Improve Auto start manager UI stability and fix FB broadcast issue
100. Improve Task Manager UI and rotation stability
101. Fix calculator stability issue and UI bug under Quick Memo App?
102. Improve Launcher and Multi user stability from System and framework
103. Fix Google Voice incoming call source issue and the failure to change to Google Voice number
104. Fix the issue that miss call counts failed to disappear on home when Multi user
105. Improve File Manager stability
106. Add ASUS ZenUI PC Suite
107. Fix all touch gestures to be enabled when change back to owner mode
108. Fix the issue that Audio Wizard cannot? be launched when turn off BT
109. Modify Japanese strings in Power Saver App
110. Fixed ringtones into vibrate mode when the camera is off camera sounds.
111. Add Battery charging ready reminder feature



For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.19.40.22 for WW SKU only* Improvement Item:

1. Add kill switch (Anti-theft) function for US regulation (US country code)
2. Improve modem capability in India
3. Fixed the issue that cannot phone with Tailand True Provider SIM1.


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.19.40.20 for WW SKU only* Improvement Item:

1. Fix the issue that sometimes HDR mode will have green line.
2. Improve the video recording quality.
3. Improve Power saver stability and fix WIFI connect state issue in advanced settings
4. Improve Auto Start Manager stability and fix the App continuous pushed notification issue after restricting its auto start
5. Fix notice shows up while the first message comes only issue
6. Fix notice shows up while the first message comes only issu
7. Update phone APN version to 105.
8. Fixed camera can not open sometimes when using zenflash
9. Improve volume of recording video will increase and decrease alternately.
10. Do not config Routing.Configure.HWCodec.Playback.Mixers.Headset when using FM.
11. Fixed some BLE device can not auto reconnect
12. Improve service stability
13. Improve modem stability from crash
14. Improve call stability
15. Quick Settings: Change "Reading Mode" button as "Bluelight filter"
16. Improve SysteM UI stability
17. Improve lockscreen UI and stability
18. Fix Homescreen Wallpaper randomly lost previous settings and half black screen issue
19. Snap View-add reset Snap View password function
20. Fix Contacts search failure issue when default language was set as HK Chinese
21. Improve Auto start manager stability and fix FB broadcast issue
22. Improve Task Manager UI and rotation stability
23. Fix calculator stability issue and UI bug under Quick Memo App 
24. Improve Launcher and Multi user stability from System and framework
25. Fix Google Voice incoming call source issue and the failure to change to Google Voice number
26. Fix the miss call issue when it is in multi-user mode.
27. Improve File Manager stability
28. Add ASUS ZenUI PC Suite
29. Fix all touch gestures to be enabled when change back to owner mode
30. Fix ASUS Browser issue
31. Fix the issue that Audio Wizard cannot  be launched when turn off BT
32. Fixed turn on the camera must unlock by using zenmotion issue
33. Fixed an error message shows up after removing privacy mode and adding new user immediately issue.
34. Fixed wallpaper needs to have second clicks for reaction issue.
35. Fixed close contacts shows other programs issue.
36. Fixed built-in calendar Click settings will flash issue.
37. Fixed ringtones into vibrate mode when the camera is off camera sounds issue.
38. Fixed volume keys to adjust the ring abnormaliy issue.
39. Fixed wallpaper Figure has been broken issue.
40. Fixed after the system optimization, message management have stopped running issue.
41. Add Battery charging ready reminder feature.
For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.19.40.20 for CN SKU only* Improvement Item:

1. Fix the issue that sometimes HDR mode resolution will have green line.
2. Improve the video recording quality.
3. Improve Power saver stability and fix WIFI connect state issue in advanced settings
4. Improve Auto Start Manager stability and fix the App continuous pushed notification issue after restricting its auto start
5. Fix notice shows up while the first message comes only issue
6. Improve signal bar stability for sim 2
7. Update phone APN version to 105.
8. Update Houdini 5.0.2
9. Fixed camera can not open sometimes when using zenflash
10. Improve volume of recording video will increase and decrease alternately.
11. Do not config Routing.Configure.HWCodec.Playback.Mixers.Headset when using FM.
12. Fixed some BLE device can not auto reconnect
13. Improve service stability
14. Improve modem stability from crash
15. Improve call stability
16. Quick Settings: Change "Reading Mode" button as "Bluelight filter"
17. Improve SysteM UI stability and modify Japanese strings
18. Improve lockscreen UI and stability
19. Fix Homescreen Wallpaper randomly lost previous settings and half black screen issue
20. Snap View-add reset Snap View password function
21. Fix Contacts search failure issue when default language was set as HK Chinese
22. Improve Auto start manager stability and fix FB broadcast issue
23. Improve Task Manager UI and rotation stability
24. Fix calculator stability issue and UI bug under Quick Memo App?
25. Improve Launcher and Multi user stability from System and framework
26. Fix Google Voice incoming call source issue and the failure to change to Google Voice numbe
27. Fix the miss call issue when it is in multi-user mode.
28. Improve File Manager stability
29. Add ASUS ZenUI PC Suite
30. Fix all touch gestures to be enabled when change back to owner mode
31. Fix ASUS Browser issue
32. Fix the issue that Audio Wizard cannot? be launched when turn off BT
33. 3rd party app update
34. Update touch FW
35. Update JP IME ATOK to v 1.0.1
36. Modify Japanese strings in Power Saver App
37. Fixed turn on the camera must unlock by using zenmotion issue
38. Fixed an error message shows up after removing privacy mode and adding new user immediately issue.
39. Fixed wallpaper needs to have second clicks for reaction issue.
40. Fixed built-in browser features a new incognito window has no effect issue.
41. Fixed close contacts shows other programs issue.
42. Fixed built-in calendar Click settings will flash issue.
43. Fixed ringtones into vibrate mode when the camera is off camera sounds issue.
44. Fixed volume keys to adjust the ring abnormaliy issue.
45. Fixed wallpaper Figure has been broken issue.
46. Fixed after the system optimization, message management have stopped running issue.
47. Add Battery charging ready reminder feature.

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.18.40.12 for WW SKU only* Improvement Item:

1. Use Google Search Widget on Default Home Screen
2. Improve Calendar App stability
3. Fix Calling screen flow issue when make calls by both SIM1 and SIM2
4. Improve Telephony stability
5. Fix the Do not disturb mode issue that "Allow only priority interruption" would be back to default settings after reboot
6. Fix MyASUS stability issue
7. Promote ASUS Power Saver
8. Fixed 3rd party app issue.
9. Return OK when setting parameters during picture encoding.
10. Do not vibrate when android mode is incall.
11. Update touch FW
12. Fixed video gamma incorrect.
13. Improve the image quality.
14. Improve service stability
15. Improve modem stability from crash
16. Improve signal bar stability
17. Force output to be primary output when using BT_SCO.
18. Fixed system will reboot when connecting to VPN
19. Increase multiPartition Number to 256
20. Fix Download yahoo mail attachment issue when using ASUS Browser
21. Fix several Browser issues
22. Optimize Miracast connection UX flow
23. Fix the issues of wallpaper installation failure through Dropbox
24. Improve Music App stability
25. Fix several issues in Settings
26. ASUS Support UI improvement
27. Improve Sound recorder stability
28. System UI: Improve the SIM icon in system UI after FOTA MR6
29. Increase 3dB gain for receiver.
30. Improve Flip Cover function
31. Using HW encode for 4G SKU.
32. Correction privacy mode can not start a single hand mode
33. Fixed difficult to lift the screen fixed function
34. Fixed SIM settings issue
35. Fixed browser unusual problem
36. Add YahooAuction (TW SKU)


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.18.40.12 for CN SKU only* Improvement Item:

1. Improve Calendar App stability
2. Fix Calling screen flow issue when make calls by both SIM1 and SIM2
3. Improve Telephony stability
4. Fix the Do not disturb mode issue that "Allow only priority interruption" would be back to default settings after reboot
5. Promote ASUS Power Saver
Provide variety of power saving mode for users to choose
Auto change to Ultra saving mode when low battery
Add Auto switch mode
6. Fixed 3rd party app issue.
7. Return OK when setting parameters during picture encoding.
8. Do not vibrate when android mode is incall.
9. Update touch FW
10. Fixed video gamma incorrect.
11. Improve the image quality.
12. Improve service stability
13. Improve modem stability from crash
14. Improve signal bar stability
15. Force output to be primary output when using BT_SCO.
16. Fixed system will reboot when connecting to VPN
17. Increase multiPartition Number to 256
18. Fix several Browser issues
19. Optimize Miracast connection UX flow
20. Fix the issues of wallpaper installation failure through Dropbox
21. Improve Music App stability
22. Fix several issues in Settings
23. ASUS Support UI improvement
24. Improve Sound recorder stability
25. System UI: Improve the SIM icon in system UI after FOTA MR6
26. Increase 3dB gain for receiver.
27. Improve Flip Cover function
28. Add 鈴聲多多 to Auto start manager black list
29. Fix System UI PS icon issues in CUCC
30. Add New customized Apps for CUCC
31. Fix CUCC customized System UI requirement issue
32. Fixed MMS flip unusual problem
33. URL correction newsletter initiate a unusual problem
34. Fixed music player problem
35. Fixed problem in guest mode
36. Fixed screen will not turn on issue


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.17.40.17 for CN SKU only* Improvement Item:

1. Fix location picker crash issue when attaching location info by Messaging
2. Fix Live Wallpaper settings issue when in landscape mode
3. Improve Camera App overall stability
4. Shorten the required time of setup calls
5. Fix outgoing call problems when using back key
6. Fix "No SIM or SIM error" issue when calling the phone number starting with 911, 112
7. Improve image quality in detail.
8. Fixed the audio sound maybe lag when using headset
9. Improve signal bar stability
10. Fixed the interruptions mode issue.
11. Fixed flip cover cannot support some apps issue.
12. Fixed the issue which shows up others app when swiching off contacts
13. Fixed Fresh Green cannot be used by ASUS ZenUI issue
14. Fixed bluetooth is easy to disconnect issue.
15. Fixed low voice issue with headset issue
16. Fixed video appears abnormal issue.
17. Fixed Gallery issue
18. Fix Easy mode crash issue
19. Fixed cannot hang up the phone issue


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.17.40.12 for WW SKU only* Improvement Item:

1. Fix location picker crash issue when attaching location info by Messaging
2. Fix Live Wallpaper settings issue when in landscape mode
3. Improve Camera App overall stability
4. Reduce the occurrence of the issue that words sometimes fail to come out when typing
5. Shorten the required time of setup calls
6. Fix outgoing call problems when using back key
7. Fix "No SIM or SIM error" issue when calling the phone number starting with 911, 112
8. Improve image quality in detail.
9. fixed the audio sound maybe lag when using headset
10. Improve signal bar stability
11. Fixed the interruptions mode issue.
12. Fixed flip cover cannot support some apps issue.
13. Fixed the issue which shows up others app when swiching off contacts
14. Fixed Fresh Green cannot be used by ASUS ZenUI issue
15. Fixed bluetooth is easy to disconnect issue.
16. Fixed low voice issue with headset issue
17. Fixed video appears abnormal issue.
18. Fixed sound interference issue while using headset
19. Fixed Gallery issue
20. Add EZ table
21. Add ZenTalk App stub in WW SKU 
22. Improve in call screen UI performance
23. Fix WIFI setting issue
24. Fix web browser settings problem
25. Fix the slient mode issue
26. Resolve the issue which the talk time turns zero while the
call record is cleared.
27. Improve camera function stability
28. Fix Interruption mode ringtone issue
29. Fix the "prevent the device from being waked up"
supportability issue
30. Fix the Ultra Saving mode issues
31. Fix Cover View Calendar issue
32. Improve double tap suspend performance
33. Add Auto start manager shortcut on home
34. Show full-charged capacity to 3000 and update battery info
para/code

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.15.40.13 for JP SKU only* Improvement Item:

1. Improve 3rd party app compatibility.
2. Fix specific dialing problem in some countries


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.15.40.13 for WW SKU only* Improvement Item:

1. Improve 3rd party app compatibility.
2. Fix specific dialing problem in some countries


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.16.40.10 for CN SKU only* Improvement Item:

1. Improve App stability
2. Improve Browser app stability
3. Fix Interruption mode ringtone issue
4. Improve communication quality
5. Improve connection establishment stability
6. Modify Android power profile table
7. Improve camera function stability
8. Fix WIFI setting which cannot memorise
9. Fix the slient mode issue
10. Fix the problem that zenmotion can be actived even the function was cloased.
11. Add max CPU frequency and Memory size information
12. Fix Wi-Fi Settings show 2 Wi-Fi APs as connected
13. Improve in call screen UI performance
14. Fix Cover View Calendar issue
15. Fix BT string issue
16. Show full-charged capacity to 3000 and update battery info para/code
17. Improve Camera quality
18. Improve Power/ Battery UI
19. Change Wi-Fi firmware for co-existence
20. Improve memory usage (enable ZRAM for full-hd device)
21. Improve double tap suspend performance
22. APN Table update
23. Improve Browser WebView compatibility
24. Update graphic driver
25. Fixed apps crashing due to Android System Webview update
26. Fixed ASUS Browser flicker issue on some desktop sites
27. Add Auto start manager shortcut on home
28. Fix Interruption mode ringtone issue


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.15.40.10 for JP SKU only* Improvement Item:

1. Update graphic driver
2. Fixed apps crashing due to Android System Webview update
3. Fixed ASUS Browser flicker issue on some desktop sites
4. Add Auto start manager shortcut on home +1
5. Change Quick Memo to Auto start manager as default in Quick settings

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.15.40.10 for WW SKU only* Improvement Item:
1. Improve memory usage
2. APN Table update
3. Fix Miracast/RealShow doesn't work issue.
4. Improve Camera quality
5. Improve Power/ Battery UI
6. Improve Browser WebView compatibility
7. Fix the Ultra Saving mode issues
8. Improve double tap suspend performance
9. Update graphic driver
10. Fixed apps crashing due to Android System Webview update
11. Fixed ASUS Browser flicker issue on some desktop sites
12. Add Auto start manager shortcut on home +1
13. Change Quick Memo to Auto start manager as default in Quick settings

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.14.40.19 for WW SKU only* Improvement Item:
1. Support Sim2 always set voice networktype
2. Smart Cover New Features
Double tap to turn off the screen
Displays the battery level on the Clock view’s color ring
Added Calendar app
Added Mystic Ball app (To enable, go to Settings > ASUS
customized settings > ASUS Cover settings > Select apps on the
cover screen.)
Allows to adjust the screen’s position
Swipe up to select and change Clock theme
Slide up the icon to launch Camera
The photos captured via Cover view are saved to ASUS Camera’
s folder
3. Power Saver: Added wake up app list management in Ultra-
saving mode
4. Themes App: Download new themes to customize your device
5. Google Drive Free 100 GB space (WW only )
6. Improve WIFI compatibility
7. Add Some Apps (TW Only)
8. Auto Start Manager:Promote Auto Start Manager entry in Quick
Box, Settings and Home Screen
9. Sound Recorder: Controls recording and playback on
notifications

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.14.40.22 for CN SKU only* Improvement Item:
1. Support Sim2 always set voice networktype
2. Smart Cover new function Support
3. Power Saver: Added wake up app list management in Ultra-saving mode
4. Improve WIFI compatibility
5. Improve network reception
6.Themes App: Download new themes to customize your device


For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes
CN：http://zentalk.asus.com.cn/ReleaseNotes

Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.13.40.13 for WW SKU only* Improvement Item:
1. APN Table Update
2. intel Graphic Driver Update
3. Improve USB network sharing behavior
4. Improve power consumption

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes


Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.12.40.11 for WW SKU only* Improvement Item:
1. Adjust LED notification behavior in BoostMaster quick charging mode
2. Update KKBOX app version

For more information please refer to:
TW：http://www.asus.com/zentalk/tw/ReleaseNotes
WW：http://www.asus.com/zentalk/ReleaseNotes


Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

ASUS ZenFone 2=ZE551ML(Z00AD/Z00ADA/Z00ADB/Z00ADC) software Image: V2.12.40.9 for WW SKU only* Steps of Update:
1. Check software version of your device**
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW.
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*How to know the device model?
Path: Settings->About-> Model number
Example: ASUS_T00I
**How to know the device software version?
Path: Settings->About-> software information->Build number
***System upgrade may cause part of data missing, please buckup your important data before system upgrading. Download

Source Code

ASUS ZenFone 2 (ZE551ML) Kernel source file for Android OS Download

ASUS ZenFone 2 (ZE551ML/ZE550ML) Kernel source file for Android M OS Download

ASUS ZenFone 2 (ZE551ML) Kernel source file for Android OS Download

ASUS ZenFone 2 (ZE551ML/ZE550ML) Kernel source file for Android OS Download

ASUS ZenFone 2 (ZE551ML/ZE550ML) Kernel source file for Android OS Download

ASUS ZenFone 2 (ZE551ML/ZE550ML) Kernel source file for Android OS Download

ASUS ZenFone 2 (ZE551ML/ZE550ML) Kernel source file for Android OS Download

ASUS ZenFone 2 (ZE551ML/ZE550ML) Kernel source file for Android OS Download

ASUS ZenFone 2 (ZE551ML/ZE550ML) Kernel source file for Android OS Download

ASUS ZenFone 2 (ZE551ML/ZE550ML) Kernel source file for Android OS Download

ASUS ZenFone 2 (ZE551ML) Kernel source file for Android OS Download