1, first prepare the data in the phone (SMS, contacts, downloaded applications, etc.), and then please follow the steps below to restore factory settings :

2, two ways:

(1) When the phone is on, go to the phone settings-storage-menu pull down to the bottom, click on restore factory settings. settings.

(2) Turn off the phone completely, and then press and hold the "volume down" + "power button" at the same time, until the phone appears in the Hboot interface, and then let go of the hands, press the volume to select the page in the FACTORY RESET this item, and then press the power button to confirm. After selecting, press the power button to confirm to clear all the data to restore the factory settings.

3, restart the phone, the phone will be restored to factory settings.

Hope this helps!