ASUS ZenFone Selfie (ZD551KL) software Image：WW_V21.40.0.2156 for IN SKU only*
Improved Item:
1. Enhance the stabilty of VoLTE funtion in India
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 PadFone2
**How to know the device software version?
Path: Settings->About-> software information->Build number
Example: CHT_PadFone2-user-10.4.17.15-UpdateLauncher
**System upgrade may cause part of data missing, please buckup your important data before system upgrading.
Ukuran File 1.67 GBytes update 2017/07/11
Download Global ASUS ZenFone Selfie (ZD551KL) software Image：WW_V21.40.0.2156