Precautions:
Please make sure that you are currently using the official version of Huawei’s system. If your Huawei system before upgrade to HarmonyOS is not official, you will face the risk of unsuccessful rollback. Furthermore, this may also cause more issues for your device. If you have an unofficial system package, go to any Huawei Customer Service Center to restore the system.
Please make sure that the current version has not been unlocked or rooted.
The rollback operation will erase all user data. Please be sure to back up all important data to a PC or cloud before rolling back. Also, confirm that the backup content is complete and valid.