Move this file to the of your internal storage (outside all folders). Install the Local Update Tool:
Downgrading your device is a serious operation. Failing to follow the steps correctly can lead to a bricked phone or data loss. Please review the following requirements before proceeding:
Check your specific model number in Settings > About Device (e.g., LE2111 for India, LE2113 for Europe, LE2115 for North America). Downloading the wrong regional firmware will brick your phone. Step 1: Download the Official OnePlus 9 Rollback Firmware downgrade oneplus 9 to android 11 exclusive
OxygenOS 11 maintains the "classic" OnePlus look, whereas Android 12 adopts Oppo’s ColorOS design. Stability: Users report significantly fewer bugs and smoother performance on Android 11. Customization:
While newer Android updates introduce cosmetic changes, many users experience significant thermal throttling, battery drain, and bugs. Rolling your device back to Android 11 (OxygenOS 11) restores the clean, lightweight, and blazing-fast user interface that made the phone a flagship killer. Move this file to the of your internal
Many users find that later versions of OxygenOS introduced "bloat" or UI changes that felt foreign to the brand's identity. Key reasons to consider the rollback include:
How to Downgrade Go to product viewer dialog for this item. to Android 11: The Ultimate Exclusive Rollback Guide You can successfully downgrade your including any personal information you added.
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While generally safe if followed correctly, any manual flashing carries a small risk of bricking the device. Oneplus 9 Pro | Downgrade to OXYGEN OS 11