1. A master reset reverts the device back to factory settings. It will permanently erase all personal data, preferences, settings.
   
2. From the home screen, tap Settings.
   
3. Scroll to, then tap Factory reset.
   
4. Tap Reset Device.
   
5. Tap OK.
   
6. If you cannot reset the device via the Settings, open the SIM card cover, and use a paper clip to press the reset button in for 8 seconds.