Downgrade Oneplus 9 To Android 11 New!

Download the official OOS 11 downgrade ZIP for your region from OnePlus’s servers:

Did you run into any "Verification Failed" errors during the local install? Downgrade Oneplus 9 To Android 11

Verify SHA256 after download.

: Download the correct rollback file for your specific region (IN, NA, or Europe) to avoid bricking your device. Method 1: Local Upgrade (Recommended) Download the official OOS 11 downgrade ZIP for

# Reboot to bootloader adb reboot bootloader Downgrade Oneplus 9 To Android 11

Select the rollback package you moved to the root directory.