The setup screen was crisp. Fast. The fingerprint icon was where it belonged. The shelf slid in from the left like an old friend.
Once finished, the phone will automatically reboot. The first boot screen may last longer than usual.
Before you begin the downgrade process, make sure you: Downgrade Oneplus 9 To Android 11
Select your downloaded rollback .zip file from the root directory. Confirm the installation and let the process run. Step 5: Reboot and Initial Setup The installation process takes roughly 10 to 15 minutes.
If your phone is stuck in a boot loop or the local update fails, use the MSM Download Tool on a Windows PC. The setup screen was crisp
Install the OnePlus Local Update APK. If it downloads as a .zip , rename it to .apk to install it. Open the installed Local Update app . Tap the gear icon in the top right corner.
If the downloaded file ends with .jar , rename it on your computer or phone file manager to end strictly with .zip . Step 3: Prepare the Installation File The shelf slid in from the left like an old friend
: Resolving battery drain or heating issues caused by newer updates. If you'd like, I can help you find:
You are trying to downgrade from Android 13 or OxygenOS 13.1 directly to Android 11. Fix: You must first downgrade to Android 12 (OxygenOS 12) using an intermediate rollback package, then downgrade to Android 11. OnePlus blocks direct major version downgrades.