How to repair Huawei's mobile phone? The software version number is not the system version.

The new software version is to optimize or repair the version history, or add some new functions and features, or install new patches, and the overall experience will be better. From the perspective of user experience, it is recommended not to go back. If you still need to roll back, you can try to roll back the version by using Hisuite mobile assistant (if you can't roll back the version by this method, it is recommended that you back up all important data to your computer or cloud, and then go to the nearest Huawei customer service center for processing).