Downgrade Oneplus 9 To Android 11 Exclusive Page

To keep your OnePlus 9 on Android 11 permanently, you must prevent the phone from automatically downloading the newer software updates again overnight. Go to . Tap the Gear Icon in the top right corner. Toggle off Auto-download over Wi-Fi . Disable Auto-update overnight . To make sure your downgrade goes smoothly, tell me:

Android 11 handles the Snapdragon 888 processor efficiently, minimizing overheating during intensive gaming or multi-tasking. Essential Pre-Downgrade Checklist

Enable or use OnePlus Switch / Clone Phone to transfer a backup file to an external hard drive or computer. downgrade oneplus 9 to android 11 exclusive

The MSM tool ignores any software locks. Even if you have a corrupted bootloader or a disabled touchscreen, this method will resurrect your phone to stock Android 11. It is the only way to downgrade if you have a hard brick.

If you own a T-Mobile OnePlus 9 (model LE2117), the downgrade process has additional complexities. T-Mobile users have reported significant issues with Android 12, including WiFi calling failures where “able to dial call but unable to hear audio from the other party”. To keep your OnePlus 9 on Android 11

There are generally two ways to revert the OnePlus 9 (Codename: Lemonade) back to Android 11, depending on your technical comfort level.

Depending on which version of Android you are currently running (Android 12 or Android 13), the steps to trigger a local installation vary slightly because OnePlus removed the local upgrade option from standard settings in later versions. If you are on Android 12: Go to > System > System Updates . Tap the Gear Icon in the top right corner. Tap Local Upgrade . Select the rollback .zip file you pasted earlier. Tap Install Now and confirm. If you are on Android 13: Toggle off Auto-download over Wi-Fi

Skip the Wi-Fi connection temporarily during setup to prevent the phone from immediately downloading Android 12/13 updates automatically.

Ensure your OnePlus 9 has at least 60% battery life to avoid shutdown during installation.