The following steps are intended for the LG Remarq.
Press the Menu/OK button, this will display the main menu.
Select Settings, then press OK.
Select Reset/Delete, then press OK.
Select Keep Existing Lock Code, then press OK.
(Note: The default lock code is the last 4 digits of the mobile number.)
Select Reset Phone, then press OK.
Press the Reset button.
Once the phone restarts, it will need to be set up for the first.