To Android 11 - Downgrade Oneplus 9

The only downside? Security patches are old (typically mid-2022) and you lose Android 12’s privacy dashboard. For most, the stability trade-off is worth it.

Using a file manager on your phone, locate the APK and tap it. Install it like a normal app. The app will be called "OnePlus Local Update" or similar. Downgrade Oneplus 9 To Android 11

, as the built-in update tool often hides the "Local install" option on newer OxygenOS versions. OnePlus Community ⚠️ Critical Warning : This process will completely wipe The only downside