2. Click General Management.

3. Click Save.

4. Check the available space. If there is not enough free space, click Clean Now to delete unnecessary programs.

You can also clean it by restoring the factory settings. It should be noted that restoring the factory settings will erase all data on the phone. Please back up your mobile phone data in advance.

(1) In standard mode, click Settings. ?

(2) Slide the screen up, find and click Backup and Reset. ?

(3) Click Restore Factory Settings.

(4) Click Reset Device. ?

(5) Click Delete All. ?

After the above operations are completed, the factory settings will be successfully restored after the mobile phone is automatically restarted.