[kronik420]

Your right it does work with the built gps. but theres one problem SPRINT lol it works on the celluar towers to pinpoint gps where as the gps reciever works on actual satellites. so if your driving and you get to an area where you have no signal I live in fl it happens way to often then you get the message lost satellite signal and you have to wait for it to find service again before the gps starts to work. Thats were the gps reciever comes in to play in cell towers needed direct line of sat to pin point location. Also it works great on the water with lat and longitude guidelines to get you to your favorite fishing spot.