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.
