How to Downgrade OnePlus 8, 8Pro, 8T to Stable Android 11 (Without Losing Data) from Android 12 [Update Europe variants]

The popular OnePlus 8, 8 Pro, and the 8T phones just recently received stable Android 12 update based on Oxygen OS 12 firmware. However, the update wasn’t quite liked by the OnePlus community since the new software is full of bugs. Some users also claim that OxygenOS 12 is a half-baked OS.

After just a couple of Open Beta updates, OnePlus released the stable version of OxygenOS 12. The OEM did not do extensive testing for the OnePlus 8 series. Hence, the latest Android 12 update is full of bugs.

The OnePlus 8 series forum threads are full of complaints too. One OnePlus community user here said, “They have really messed up the update man fast charging shouldn’t even be called fast anymore.” Another user named Jvinas has to say this in his/her’s comment, “Hi. Do not install the update. At least for now. Stay on Oxygen OS 11. When I updated, I lost access to 5G and VoLTE, and VoWI-Fi. If these technologies are working for you now on Oxygen OS 11. Do not update to OS 12.”

Seems like the stable Android 12 update isn’t quite stable just yet. The most common issues are related to battery drain, low SOT, Ambient display, performance issues, and more.

A lot of users are just beginning to receive OTA updates. It is advised to wait for a couple of more HotFix OTA updates in the coming days. If you have already upgraded to OxygenOS 12, you may want to rollback to a more stable Oxygen OS 11 firmware based on Android 11.

Here is how to downgrade from the Oxygen OS 12 for the OnePlus 8, 8 Pro, and 8T to Android 11 without losing data. The easiest solution is to download the downgrade package from below and install using the Local upgrade method.

Download OnePlus 8 Series Android 11 Downgrade or Rollback Package

Download the stable OxygenOS 11 full stock firmware zip in order to downgrade to Android 10.

• Download links for OnePlus 8 rollback packages:
  • Downgrade zip to OxygenOS 11 for OnePlus 8 (IN)
  • Downgrade zip to OxygenOS 11 for OnePlus 8 (NA)

• Download links for OnePlus 8 Pro rollback packages:
  • Downgrade zip to OxygenOS 11 for OnePlus 8 Pro (IN)
  • Downgrade zip to OxygenOS 11 for OnePlus 8 Pro (NA)

Downgrade zips for European variants

• OnePlus 8 IN21BA Europe
  • 10.5.10: OnePlus8Oxygen_15.E.19_GLO_019_2008080048
    AFH Mirror
  • 11.0.7.7: OnePlus8Oxygen_15.E.37_GLO_0370_2106011647
  • 11.0.9.9 (you have to add the .zip extension manually after downloading the file):
  •  OnePlus8Oxygen_15.E.40_GLO_0400_2110091932

• OnePlus 8 Pro IN11BA Europe
  • 10.5.12: OnePlus8ProOxygen_15.E.21_GLO_021_2008080100
    AFH Mirror link
  • 11.0.7.7: OnePlus8ProOxygen_15.E.37_GLO_0370_2106020020
  • 11.0.9.9 (you have to add the .zip extension manually after downloading the file): 
  • OnePlus8ProOxygen_15.E.40_GLO_0400_2110091931

• OnePlus 8T KB05BA Europe
  • 11.0.6.8: OnePlus8TOxygen_15.E.22_GLO_0220_2012171750
  • 11.0.8.14: OnePlus8TOxygen_15.E.26_GLO_0260_2106020020
  • 11.0.11.11 (you have to add the .zip extension manually after downloading the file):
  •  OnePlus8TOxygen_15.E.29_GLO_0290_2110091931

Rollback to OxygenOS 11 on OnePlus 8, 8 Pro, and 8T without losing data

Step 1 – Backup:

How to back up your data?
OnePlus Switch or Clone Phone helps you backup and restore contacts, call history, short messages, photos, videos, documents, files, system data, and apps. Note that app data will not be backed up. So make sure to sync apps and games that support this feature.

1. Download OnePlus Switch or Clone Phone from Play Store. Or APK Download here.
2. Go to Settings > Utilities > OnePlus Switch and select Backup and Restore > New Backup.
3. Select all the files you want to back up.
4. Tap on Start Backup.
5. Copy the [opbackup] folder in your phone storage to your computer

Important – Once the backup process is complete, make sure to copy the [opbackup] folder in your phone storage to your computer or PC. Keep this folder so you can restore the backup through OnePlus Switch.

Step 2 – Flash Downgrade package

Note: This upgrade method will erase all the contents of the phone, please be sure to backup first.

1. Download the suitable rollback package from the links below.
2. Copy the Rollback package to the phone storage.
3. Download and Install this APK from OnePlus. You’ll need it to roll back.
4. Then, open the “MyApplication2” app -> tap LOCAL UPGRADE, then enter the Recent page -> tap the top-left menu icon -> chose your phone model -> find the downgrade package and tap -> then will jump to another page and have an Installation options alert, tap INSTALL NOW -> wait to finish the installation -> tap reboot​
5. After the upgrade is complete, click Restart.
6. Rollback successful.

Step 3 – Restore:

1. Download OnePlus Switch or Clone Phone from Play Store. Or APK Download here.
2. Copy the [opbackup] folder from computer to phone storage.
3. Go to Settings > Utilities > OnePlus Switch and select Backup and Restore > Restore.
4. Select all the files you want to restore.
5. Tap on Start Restore.

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