How to restore the factory settings of general attendance machine

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 down the volume reduction key and the power button at the same time until the Hboot interface appears on the phone, then let go, press the option of restoring factory settings on the volume selection page, press the power button after selection to confirm that all data is cleared and the factory settings are restored.

3. After restarting the phone, the phone will return to the factory settings.