Originally Posted by
Machka
Cell phones do not work everywhere ... just a hop, skip, and a jump west of where I live, cell phone coverage dies, and then there's quite a large area (the Rocky Mountains) where you won't get cell phone coverage at all, or only occasional coverage.
A true GPS receiver determines your location using satellites, so not having cell coverage isn't an issue. The advantage of having coverage is being able to dynamically download maps as you need them. Without coverage you can still get your latitude and longitude and find your location on a map.