Hes a little trick I found somewhere (poss this site ?)to test your K700 phone. Press joystick/nav key Right Press * Press joystick/nav key Left Press joystick/nav key Left again Press * Press joystick/nav key Left Press * (Ignore anything that may appear on display). You will be presented with "Service" screen with 3 options: "Service Info" "Service screen" "Text Labels". Selecting Service Info gives Model No, Phone software info etc. Selecting "Service Tests" allows you to test the phones functions. The Flash LED test would be useful to attract attention if you were stuck up a mountain