1. 1. Find" Factory data reset"
Slide your finger downwards starting from the top of the screen.
Press the settings icon.
Press the settings icon at the top of the screen.
Press Backup & reset.
Press Factory data reset.
2. 2. Restore factory default settings
Press Reset phone.
Press Erase everything. Wait a moment while the factory default settings are restored. Follow the instructions on the screen to set up your phone and prepare it for use.