Downgrade Oneplus 9 To Android 11 Best May 2026

To downgrade your OnePlus 9

A warning will appear stating that this will wipe your data. Tap Completion & Reboot: The installation will begin and usually takes about 10–15 minutes Once finished, tap Downgrade Oneplus 9 To Android 11

  1. Go to the OnePlus website and sign in to your account.
  2. Navigate to the "Device" section and select your OnePlus 9 model.
  3. Click on "Unlock Bootloader" and follow the on-screen instructions.
  4. Once your bootloader is unlocked, proceed to the next step.

Credits

  • OnePlus for the rollback packages
  • XDA: @Some_Random_Username for MSM collection
  • @mauronofrio for fastboot ROMs

Preparation