Find "Factory data reset"
Press Applications.
Press Settings.
Press Privacy.
Press Factory data reset.
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 display to set up your phone and prepare it for use.
Wait a moment while the factory default settings are restored.
Follow the instructions on the display to set up your phone and prepare it for use.