The most reliable resource for downgrading your Go to product viewer dialog for this item.
is the OnePlus Community Forums, specifically their official "Rollback" threads. These guides are essential because they provide the official Rollback APK and the specific Android 11 firmware packages needed for your region (Global, NA, or IN). Recommended Article & Guide
For a clear, step-by-step process, refer to the OxygenOS Rollback Guide on the OnePlus Community. Key Prerequisites
Back Up Everything: This process will erase all data on your phone. Battery: Ensure your phone has at least 30% battery. Storage: You need at least 5GB of free space. General Downgrade Steps
Download the Rollback Package: Find the Android 11 zip file specific to your OnePlus 9 model and region.
Enable Developer Options: Go to Settings > About Device > Version and tap Build Number 7 times.
Install the Local Update Tool: If you are on Android 12 or 13, the standard "Local Upgrade" option might be hidden. You may need to install the OnePlus Local Update APK provided in community threads. Execute the Downgrade:
Move the downloaded zip file to the root directory (outside all folders) of your phone storage.
In the Local Update app/menu, select the zip file and confirm the installation. Once the progress reaches 100%, tap Restart.
Downgrade any Oneplus Phone from OxygenOS 13 to Stable OxygenOS 12
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
[Stable] OxygenOS 14 is rolling out for the OnePlus 9R (IN ONLY)
Downgrading your OnePlus 9 to Android 11 (OxygenOS 11) is a common move for users looking for better stability or a specific interface style This process will completely wipe your phone , so ensure you have a full backup before starting. Pre-Downgrade Checklist Backup Everything:
Move photos, contacts, and documents to a cloud service or a PC. Battery Charge: Ensure your phone is charged to at least 30-50%. Verify Model/Region:
Download the specific rollback package for your region (NA, IN, or EU) to avoid bugs. Step-by-Step Downgrade Guide Download Necessary Files: Rollback Package:
Get the official Android 11 rollback ZIP file for your specific OnePlus 9 model. Local Update APK:
On newer OxygenOS versions, the standard "Local Upgrade" option may be hidden. You might need to download and install the OnePlus Local Update APK to perform the manual install. Prepare the Files:
Find the downloaded rollback package in your "Downloads" folder. If it ends in rename it to Move the package to the root directory of your internal storage (outside of any folders). Install the Rollback: Local Update app you installed. in the top-right corner.
Select the rollback package you just moved to the root storage. Confirm and Wipe:
A warning will appear stating this will reset the device. Tap Install Now
Wait for the installation to reach 100%. This typically takes 5–10 minutes. Once complete, tap
. The phone will perform a factory reset and boot into the OxygenOS 11 setup screen. Troubleshooting & Tools
If your phone is stuck in a bootloop or the local update method fails, you may need to use the MSM Download Tool
, which is a specialized utility for unbricking and deep downgrades via a Windows PC. This requires a computer and puts the phone into "EDL mode" by holding both volume buttons while connecting it via USB. Oneplus 9 Pro | Downgrade to OXYGEN OS 11
Tap Install Now or Upgrade. The phone will reboot into recovery mode and begin installing Android 11.
Do not touch the phone during this process. You will see a progress bar. The screen may flicker – this is normal.
Downgrading a OnePlus 9 to Android 11 is technically possible but requires careful consideration of the implications. While it can solve certain problems or satisfy personal preferences, it also comes with significant risks, including potential security vulnerabilities and loss of access to newer features and updates.
If you decide to proceed, ensure you're comfortable with the process, take necessary precautions like backing up your data, and understand that you're doing so at your own risk.
Recommendation: 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.
Before we discuss the how, let’s discuss the why. Understanding this helps validate your decision.
Cause: You downloaded the wrong regional build (e.g., EU package on an Indian device). Fix: Redownload the correct rollback package for your exact model (LE2111, LE2113, etc.). Check the file MD5 checksum.
Go to Settings > About Phone. Note the model number:
You must download the correct downgrade package for your region.
Since the downgrade wipes all user data, use the OnePlus Switch app to back up your contacts, messages, call logs, and apps to an external USB drive or PC. Manually back up photos and documents to Google Drive or a computer.
