Downgrade Oneplus 9 To Android 11 [patched] -

If the downloaded rollback package ends in .jar , rename it by deleting the .jar extension so it ends in .

: Go to Settings > About Device > Version and tap Build Number 7 times. Downgrade Oneplus 9 To Android 11

Modern OxygenOS builds hide the manual local installation menu unless Developer Options are active. Open on your OnePlus 9. Scroll down and tap About Device . Tap on Version to reveal the Build Number. Tap Build Number seven times consecutively. Enter your lock screen PIN or password when prompted. If the downloaded rollback package ends in