Downgrade Oneplus 9 To Android 11 Exclusive -

: Ensure your phone has at least 60% battery capacity . A sudden shutdown mid-flash will permanently hard-brick your hardware.

Flash sequence (order matters):

The installation steps depend on whether your OnePlus 9 is currently running Android 12 or Android 13. Newer OxygenOS versions hide the local upgrade option, requiring a workaround application. Step 1: Prepare the Firmware File downgrade oneplus 9 to android 11 exclusive

Click to begin the process. The system will now wipe your device and flash Android 11. : Ensure your phone has at least 60% battery capacity

Once on Android 11, apply these to prevent forced updates: apply these to prevent forced updates: