Once the installation finishes, the screen will display a prompt to restart your device. Tap the button.
Tap seven times consecutively until a toast message says, "You are now a developer."
If you want to install Google Apps, such as Google Play Store, Google Maps, and Google Assistant, follow these steps: downgrade oneplus 9 to android 11 exclusive
The super partition must be erased and recreated using fastboot delete-logical-partition commands before flashing raw images.
The Ultimate OnePlus 9 Downgrade Guide: Returning to the OxygenOS 11 Glory Days Once the installation finishes, the screen will display
to Android 11 (OxygenOS 11) is a common move for enthusiasts . However, this process is high-stakes; it will , so a full external backup is mandatory before you begin. Essential Pre-Flight Checklist
: The rollback process will erase every single file on your phone, including photos, contacts, and apps. Backup everything to a cloud service like Google Photos or a PC before proceeding. The Ultimate OnePlus 9 Downgrade Guide: Returning to
: If the downloaded file ends in .jar , rename it to .zip before proceeding. 2. Install the Local Update APK
from later versions of OxygenOS back to stable Android 11 by utilizing a official regional rollback package and the OnePlus Local Update APK application.