How to restore Gionee Tian Jian series flip cover to factory?

According to your description, I suggest you follow the following steps:

1. Prepare data (SMS, contacts, downloaded applications, etc. ), and then please follow the following steps to restore the factory settings:

2, two ways:

(1) Turn on the phone, enter the phone settings-storage-menu, pull it to the bottom, and click Restore 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.

I hope this can help you!