What is your exact (found in Settings > About Device)?
The internal storage layout of Android requires precise placement for the local update tool to detect the downgrade package. downgrade oneplus 9 to android 11 exclusive
Toggle the "Auto-download over Wi-Fi" and "Auto-update overnight" switches. Troubleshooting Common Flashing Issues What is your exact (found in Settings > About Device)
Official rollback packages for OnePlus 9 are available for Global (AA), European (BA), and Indian (DA) variants. downgrade oneplus 9 to android 11 exclusive
By following this guide, you'll be able to downgrade your OnePlus 9 to Android 11 exclusively. However, we recommend you to proceed with caution and consider the risks and consequences before making any changes to your device.