Downgrade Oneplus | 9 To Android 11

rollback package

To downgrade your OnePlus 9 to Android 11 (OxygenOS 11), you must use a official . This process will completely wipe all data on your device, so a full backup is mandatory before starting. Prerequisites

. While newer versions like OxygenOS 12 and 13 introduced a "ColorOS-ified" interface and reported bugs, Android 11 (OxygenOS 11) is praised for its smoother performance and original OnePlus identity. The Review: Is It Worth It? Pros: Why Users Go Back Performance Stability: Downgrade Oneplus 9 To Android 11

Select the Package

: Tap the gear icon (top right) and select the rollback package you moved to the root directory. rollback package To downgrade your OnePlus 9 to

root directory

Move this file to the of your phone's internal storage (do not put it in any folder). Enable Local Upgrade While newer versions like OxygenOS 12 and 13