Downgrade Oneplus 9 To Android 11 Exclusive

OxygenOS 11 maintains the "classic" OnePlus look, whereas Android 12 adopts Oppo’s ColorOS design. Stability: Users report significantly fewer bugs and smoother performance on Android 11. Customization:

: Secure your data using cloud services like Google Drive or move files to a computer. Move critical assets including contacts, photos, 2FA tokens like Google Authenticator, and custom app folders. downgrade oneplus 9 to android 11 exclusive

Move the rollback .zip file to the of your phone's internal storage (do not put it in any folder). Phase 2: Execution (Local Upgrade Method) This is the standard official method for a working device. OxygenOS 11 maintains the "classic" OnePlus look, whereas

Downgrading is not without its casualties. Move critical assets including contacts, photos, 2FA tokens

Charge your phone to at least 60% or higher to eliminate the risk of mid-flash shutdowns.

Official links are typically found in the OnePlus Community forums : [CLOSED] Roll back - OnePlus Community

This tool allows you to flash the package. Backup Data: Move all important files to a computer. Step-by-Step: Downgrade OnePlus 9 to Android 11