what does gps do
What is a GPS? How does it work? The Global Positioning System (GPS) tells you where you are on Earth. Itâs eleven oâclock ... do you know where your kids are? Would you like to? One way to track them would be to have a GPS receiver installed in the car! The GPS, or Global Positioning System, is one of the hottest technologies around, and no wonder. Consider these diverse uses: Minnesota scientists use GPS to study movements and feeding habits of deer.
GPS does not require cellular service to work. What Apple did do is if you do have cellular services the cell towers can augment the GPU signal (getting better accuracy). This is useful in cities where the signal could be blocked or faint. On the open rural roads you won't need a cellular service to have GPS services.