Downgrade Oneplus 9 To Android 11 [work] Guide

Step 3: Boot into Fastboot Mode

Run type the command adb devices to check that your device is connected. Downgrade Oneplus 9 To Android 11

Go to Settings > About phone. Browse down and tap on Build number 7 times to enable Developer options. Go back to Settings > Developer options. Move down and toggle on USB debugging. Step 3: Boot into Fastboot Mode Run type

Step 2: Download and Install the Downgrade Package Downgrade Oneplus 9 To Android 11

Conclusion

Restart your device by choosing Reboot > System. Wait for your device to launch into Android 11. Follow the on-screen guidelines to set up your device.