Downgrade Oneplus 9 To Android 11 Exclusive Access

You need a file specific to your model:

The OnePlus 9 launched with OxygenOS 11, which was widely regarded as one of the most stable iterations of the software. The upgrade to Android 12 introduced significant changes: downgrade oneplus 9 to android 11 exclusive

Downgrading is not without its casualties. You need a file specific to your model:

If you change your mind: