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
While the OnePlus 9 initially received praise for its flagship performance, many users eventually found that newer updates—specifically Android 12 and 13—introduced bugs, battery drain, or UI changes that felt less "OxygenOS" and more like Oppo's ColorOS. If you're missing the stability and sleekness of the original software, this guide will walk you through how to downgrade your OnePlus 9 to Android 11 (OxygenOS 11). Important: Read Before Proceeding
Complete Data Wipe: This process will irreversibly erase all your data, including photos, apps, and messages.
Battery Level: Ensure your phone is charged to at least 50% to avoid any shutdowns during the flashing process.
Regional Versions: Download the rollback package that matches your specific model (Global, India, or EU) to avoid network issues. Phase 1: Backing Up Your Data
Since your phone will be factory reset, you must secure your files first.
Google Account: Go to Settings > System > Backup and ensure Back up to Google Drive is toggled on.
OnePlus Clone Phone (formerly Switch): Use the OnePlus Clone Phone app to create a local backup of your contacts, logs, and messages. Downgrade Oneplus 9 To Android 11
Manual Media Transfer: Connect your phone to a PC and manually copy the DCIM and Pictures folders to your computer. Phase 2: Downloading the Rollback Files
You need two specific files: the Rollback Firmware and the Local Update APK (since the local update option is often hidden in Android 12/13). YouTube·Altered Tech How to Downgrade from OxygenOS 12 to OxygenOS 11
Title: Turning Back Time: A Guide to Downgrading the OnePlus 9 to Android 11
The OnePlus 9 series, powered by the formidable Snapdragon 888, was a flagship contender that launched with Android 11 out of the box. Over time, OnePlus pushed significant updates, eventually landing on Android 12, 13, and beyond, often with the much-debated ColorOS (or OxygenOS based on ColorOS) merger.
While newer software usually means better features, many users find themselves preferring the clean, lightweight aesthetic of OxygenOS 11 or seeking to escape battery drain and bugs introduced in later updates. If you are looking to revert your device to its "golden age" of software, here is an informative breakdown of the process, the risks, and the rewards.
Downgrading a OnePlus 9 to Android 11 involves several steps and comes with risks, including potential data loss and issues with future software updates. Here's a general overview of the process:
Downgrading is not a standard OTA update. You are flashing software manually. Failing to prepare can result in a bricked device.
Downgrading your OnePlus 9 to Android 11 is a straightforward process using the official Local Update method. While it requires a full backup and a careful download, the result is a return to the fluid, battery-efficient, and camera-focused OxygenOS that made the OnePlus 9 a fan favorite.
Remember: Always download rollback packages from official sources. Avoid random file-hosting sites. If you follow this guide step-by-step, your OnePlus 9 will be back on Android 11 within 20 minutes.
Do you have a unique error while trying to downgrade? Check the OnePlus Community forums or XDA Developers for device-specific rollback threads updated for your exact build number.
Downgrading OnePlus 9 to Android 11: A Step-by-Step Guide
Are you a OnePlus 9 user who's not too thrilled with Android 12 and wants to downgrade to Android 11? Perhaps you're experiencing bugs or performance issues with the latest operating system, or you simply prefer the older version. Whatever the reason, downgrading your OnePlus 9 to Android 11 is possible, but it requires some technical expertise and caution. In this blog post, we'll walk you through the process.
Warning: Downgrading to Android 11 will void your warranty and may cause data loss. Proceed with caution and at your own risk.
Preparation
Before you begin, make sure you have:
Step-by-Step Downgrade Process
Post-Downgrade Steps
Conclusion
Downgrading your OnePlus 9 to Android 11 is a complex process that requires careful attention to detail. While it's possible to revert to an older version, keep in mind that you may miss out on newer security patches, features, and bug fixes. Additionally, downgrading will void your warranty, and you may encounter issues with future software updates.
If you're still experiencing issues with Android 12 or prefer Android 11, follow these steps carefully. However, if you're satisfied with Android 12, it's recommended to stick with the latest operating system for the best user experience.
Disclaimer: This guide is for educational purposes only. Downgrading your device is done at your own risk. The author and this blog are not responsible for any damage or issues that may arise during or after the downgrade process.
To downgrade your to Android 11 (OxygenOS 11), you must use a specific rollback package. This process will erase all data on your device , so a full backup is essential before starting. Critical Pre-Downgrade Checklist Backup Data
: Ensure all photos, messages, and files are backed up to a cloud service like Google Photos or an external drive. Battery Level : Keep your device charged above to avoid power failure during the flash. Remove Security
: Disable any screen locks, fingerprints, or PINs to prevent encryption conflicts. Verify Model
: Download the correct rollback file for your specific region (IN, NA, or Europe) to avoid bricking your device. Method 1: Local Upgrade (Recommended)
This method is for functional devices running OxygenOS 12, 13, or 14. Download Files Android 11 Rollback Package OnePlus Local Update APK from the official OnePlus Community Rename Extensions If the rollback file ends in , rename it to end in If the local update tool ends in , rename it to end in Place Files : Move the rollback root directory of your phone's internal storage (not inside any folder). Install Tool : Install the Local Update APK and open it. Run Downgrade in the top right. Select the rollback file you moved to your storage. Confirm the warning that your data will be wiped. : Once finished, tap
. The device will boot into recovery, perform a factory reset, and then load OxygenOS 11. Method 2: MSM Download Tool (For Bricked Devices)
If your phone is stuck in a boot loop or the local update fails, use the MSM Download Tool on a Windows PC.
How to Downgrade Your OnePlus 9 to Android 11 (OxygenOS 11) If you've updated your OnePlus 9 to Android 12 or 13 and found it buggy or simply prefer the classic OxygenOS experience, you can roll back to Android 11. This process is official but will completely wipe your phone, so a full backup is essential before starting. Prerequisites
Backup Your Data: Moving to an older version of Android requires a factory reset. Use cloud services or a computer to save your photos, contacts, and documents.
Battery Level: Ensure your device has at least 30% battery to prevent it from shutting down mid-process.
Rollback Package: Download the specific OxygenOS 11 rollback ZIP for your region (IN, NA, or Europe) from the official OnePlus Community. Step 1: Install the Local Update Tool
OxygenOS 12 and 13 often hide the "Local Upgrade" option. To get it back, you need to install a specific APK provided by OnePlus. Download the OPLocalUpdate APK.
If the file downloaded as a .zip, use a file manager to rename it, removing the .zip extension so it ends in .apk. Install and open the app. Step 2: Perform the Rollback
Move the downloaded Android 11 rollback ZIP file to the root directory of your phone's internal storage (do not leave it in the "Downloads" folder). Open the Local Update app you just installed. Tap the gear icon in the top-right corner.
Select the rollback package you moved to the root directory. Downgrading your OnePlus 9 to Android 11 (OxygenOS
Confirm the installation. The phone will verify the package and then begin the downgrade. Step 3: Finalize and Setup
Once the installation finishes, your phone will prompt you to Restart. It will boot into recovery mode, perform a factory reset, and then restart into the OxygenOS 11 setup screen. Alternative: The MSM Download Tool
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 OnePlus 9 to Android 11: A Review of the Process and Implications
Downgrading a smartphone from a newer version of Android to an older one is not a common practice, but it can be necessary for various reasons, such as compatibility issues with certain apps or a preference for an older user interface. In this review, we'll explore the process of downgrading a OnePlus 9 from Android 12 (or later) to Android 11, the implications of doing so, and what you can expect.
Use if downgrade fails or device is soft-bricked.
Cause: You are trying to downgrade from Android 13 or OxygenOS 13.1 directly to Android 11. Fix: You must first downgrade to Android 12 (OxygenOS 12) using an intermediate rollback package, then downgrade to Android 11. OnePlus blocks direct major version downgrades. Enabled Developer Options : On your OnePlus 9,