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For most users, it's recommended to stay on the latest available Android version for security and compatibility reasons. However, if you have a specific need to downgrade, make sure to follow a reliable guide and use firmware from trusted sources.
Download the Android 11 rollback ZIP file specific to your OnePlus 9 model and region (India, Europe, or North America). OnePlus Local Update Tool: Downgrade Oneplus 9 To Android 11
. The phone will perform a factory reset and boot into the OxygenOS 11 setup screen. Troubleshooting & Tools For most users, it's recommended to stay on
23 Nov 2022 — once you have enabled developer. option just go back tap on update. section and from here you need to tap on these three dots you' YouTube·TechiBee OnePlus Local Update Tool:
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.