But here is the catch: OnePlus has made this process deliberately difficult. Official rollback packages are buried, and standard factory resets will not work. This article provides to safely revert your OnePlus 9 (including Pro and T variants) to the coveted Android 11 firmware.
Install and open the Local Update APK you downloaded. Select the Firmware: Tap the gear icon (settings) in the top-right corner. downgrade oneplus 9 to android 11 exclusive
By following these steps, you should be able to successfully downgrade your OnePlus 9 to Android 11. However, proceed with caution and at your own risk. But here is the catch: OnePlus has made