11 — Downgrade Oneplus 9 To Android

To prevent your OnePlus 9 from immediately downloading and reinstalling the Android 12 or 13 update overnight, disable automatic updates. Go to > System > System Updates . Tap the Gear Icon in the upper right corner.

Use services like Google Photos or the OnePlus Community recommended methods to save your personal files .

: Navigate to Settings > About Phone > Version . Then, tap on Build Number 5-7 times until "You are now a developer!" appears. Return to Settings > System > Developer options and enable USB debugging . Downgrade Oneplus 9 To Android 11

Toggle off and Auto-update overnight . To help ensure a smooth firmware installation, let me know: Your exact OnePlus 9 model number (e.g., LE2111, LE2115). Your current Android version (Android 12 or 13). If you are using a carrier-locked variant (like T-Mobile).

Move or copy the file out of the Downloads folder and paste it directly into the root directory (the main folder that appears when you first open your storage). Step 3: Trigger the Local Upgrade Process To prevent your OnePlus 9 from immediately downloading

If your file manager shows the rollback package as a .zip file, ensure you have the apk file installed.

Ensure you are using the correct rollback zip file for your exact regional variant (e.g., India vs. Europe) and that the file is not corrupted. Use services like Google Photos or the OnePlus

Go to Settings > System > Backup and trigger a manual Google backup for contacts, app data, and settings.

The for your specific region (IN, NA, or EU).

Downgrading your device may void its warranty and may cause unforeseen issues. Proceed at your own risk. We're not responsible for any damage or issues that may arise during or after the downgrade process.