To downgrade your to Android 11 (OxygenOS 11), you can follow two primary methods. Both methods will completely wipe all data
: Sometimes downloads append extra characters (like .jar or .zip.j ). If the firmware ends in .jar , rename it to end exactly in .zip . If the APK ends in .zip , rename it to .apk . downgrade oneplus 9 to android 11 exclusive
Whether you’re missing the classic OxygenOS experience or troubleshooting bugs in newer versions, rolling back your To downgrade your to Android 11 (OxygenOS 11),
After the installation finishes, tap . Your device will boot into recovery, perform a factory reset, and eventually start up with the OxygenOS 11 setup screen. perform a factory reset