Official links are typically found in the OnePlus Community forums : [CLOSED] Roll back - OnePlus Community
The transition from OxygenOS 11 to later builds marked a massive shift for OnePlus, as the brand integrated its codebase with Oppo's ColorOS. This merger altered the user experience fundamentally. Users frequently downgrade to achieve specific performance goals:
Copy the rollback ZIP file to the root of your internal storage (not inside any folder). Then, install the OnePlusLocalUpdate_for_Android12.apk (this is the hidden system updater). Open the app, select the ZIP file, and confirm. downgrade oneplus 9 to android 11 exclusive
Many OnePlus 9 users found that updating to Android 12 or Android 13 altered their device's user experience. The transition from the classic, lightweight OxygenOS to a codebase shared with Oppo's ColorOS changed the system's overall aesthetic and functionality.
If your device is bricked or the local upgrade fails, use the . This is a powerful PC-based utility that flashes the phone in EDL (Emergency Download) Mode . How to Unbrick OnePlus 9/9 Pro/9R via MSM Download Tool Official links are typically found in the OnePlus
However, if you're looking for a stable and feature-rich operating system, Android 11 is still an excellent choice. With this guide, you should be able to successfully downgrade your OnePlus 9 to Android 11 and enjoy a more familiar and stable user experience.
: Secure your data using cloud services like Google Drive or move files to a computer. Move critical assets including contacts, photos, 2FA tokens like Google Authenticator, and custom app folders. Then, install the OnePlusLocalUpdate_for_Android12
Android 11 offers more granular control over individual app icons and status bar personalization, features that were removed or restricted in later versions. Battery Life:
: Download the "MyApplication2" or "OnePlus Local Update" APK. This tool allows you to manually select the rollback file. Prepare the Files :