Second, brush your mobile phone and make a good backup of important files.

Download and install a mobile phone security software for deep cleaning. Personally, I suggest to choose the third scheme, and recommend the landlord to install Tencent mobile phone housekeeper, because I know it myself. First, open Tencent Mobile Manager, log in to the operation interface, switch to the "health optimization" section, click "deep cleaning" to enter "deep cleaning", and we will see that the program shows "uncleaned". Now, click "Deep Scan" at the bottom directly, and start a deep garbage scan of the mobile phone system, waiting for the scan to be completed.

Use pea pods client and garbage cleaning function to clean up the garbage files in the mobile phone;

Go to Settings-Application Management-Installed, select the application that comes with the system, and then select Uninstall Update or Clear Data;

The last way is to restore the phone to the factory settings.