1. Prepare data (SMS, contacts, downloaded applications, etc. ) In the mobile phone, please follow the following steps to restore the factory settings: 2. There are two ways: (1) Turn on the mobile phone, enter the bottom mobile phone settings-storage-menu, and click Restore the factory settings. (2) Turn off the phone completely first, then press and hold the "Volume Down Key"+"Power Key" at the same time until the Hboot interface appears on the phone, then let go, press the "Restore Factory Settings" item on the volume selection page, and then press the "Power Key" to confirm that all data is cleared and restore the factory settings. 3. After restarting the phone, the phone will return to the factory settings.