: Once the rollback zip is downloaded, move it to the root directory of your phone's internal storage (do not put it in a folder).
Download the specific rollback package for your region (IN, NA, or Europe). Downgrade Oneplus 9 To Android 11
Download the specific rollback package for your region (NA, IN, or EU) to avoid bugs. Step-by-Step Downgrade Guide Download Necessary Files: Rollback Package: : Once the rollback zip is downloaded, move
Android 11.
Note: The screen may look like it’s stuck on the boot logo for up to 10 minutes. This is normal. make sure you have:
OxygenOS 12 and 13 often hide the "Local Upgrade" option. To get it back, you need to install a specific APK provided by OnePlus. Download the .
Before you begin, make sure you have: