apple iphone 4s 16gb black great condition ( no service) wifi/gps/camera/music still working ?

hi i have an apple iphone 4s 16gb black for sale great condition but has a fault with the signal the wifi and gps still work and every other function still works , you can still use camera the maps app and music with siri of course which i have to say is amazing thanks for looking please email or text for more info thanks