Ensure your phone is charged to at least 30% (60% is recommended) to prevent power loss during the flash.
This is the standard method for users currently on a stable version of OxygenOS 12 or 13. Downgrade Oneplus 9 To Android 11
to Android 11. This process is useful for troubleshooting bugs or preparing for custom ROM installations, but it will . Essential Prerequisites Ensure your phone is charged to at least
All data, including photos, contacts, and messages, will be permanently deleted. Downgrade Oneplus 9 To Android 11
Enable these by going to Settings > About Device > Version and tapping "Build Number" seven times. How to Downgrade (Local Upgrade Method)