@Cigdem
Please refer to the following to flash the system back to Android P.
ASUS ZenFone 5 Software downgrade to target Image
Version: 16.0615.2002.120 (Android 9 Pie) by using MicroSD card for WW SKU only
* Please follow step 6 and ensure to backup data before downgrade.
Version Android 10 downgrade to P (1.98 GB)
2020/04/06
Steps of Update:
1. Prepare a MicroSD card.
2. Check software version of your device**
3. Only apply to same SKU update, Example: WW->WW, CN->CN, TW->TW, ID->ID.
4. Software update cannot transfer the software SKU.
5. Wrong SKU may cause update failure, please update the same SKU version only.
6. How to manual update firmware please refer to
https://www.asus.com/support/FAQ/1042349
*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 backup your important data before system upgrading.
Sorry for any inconvenience it may be caused.
