Downgrade Oneplus 9 To Android 11 ((top)) Jun 2026

Tap on the seven times consecutively until a toast message says, "You are now a developer."

: Download the official OxygenOS 11 rollback ZIP file to your phone's internal storage. Downgrade Oneplus 9 To Android 11

To downgrade your OnePlus 9 Go to product viewer dialog for this item. Tap on the seven times consecutively until a