Originally Posted by
AT Traveler
Those typically require all the phones to be on and inside cell tower reception. Wander outside of the cell coverage zone and they don't like to work well. There are some applications now that allow you to track people, cars, pets, etc., in real time, but those are specialized devices that require the use of computer and are "one way" type (broadcast only) and the one being tracked cannot see themselves or others. There was some talk about development of a smart phone/GPS application but I have not seen anything more on that in a while.