Hi,
Have you read these steps before doing something and if not, you must follow these lines, which are in post 1
OBT to Previous OBT rollback guide—via Local OTA update
Note: This upgrade method will erase all the contents of the phone, please be sure to backup first.
1. Download the latest ROM upgrade zip package from the specified server.
2. Copy the Rollback package to the phone storage.
3. Go to Settings -> System -> System Updates -> Click top right icon -> Local upgrade -> Click on the corresponding installation package -> upgrade -> System upgrade completed to 100%.
4. After the upgrade is complete, click Restart.
5. Update successful.
Ready to get started on the Open Beta 1?
Want to go back to Android 10 OBT? Download the Rollback package from the links below:
Last edited: Jan 28, 2021