There's a good chance the your cell phone is a Cell Phone GPS device and a tiny device in it is picking up faint radio signals from space and keeping track of your location. It's a Global Positioning System -- or GPS -- receiver,
built into your Cell Phone GPS.

A hundred million or so people in the United States have Cell Phone GPS devices in their cell phones, but few, up to now, have been able to use them.
Selling The Cell Phone GPS Idea
Some Cell Phone GPS companies wanted technology that locates a cell phone by analyzing how its signal is picked up by different cell towers. The Cell Phone GPS idea took hold because this is an accurate way for locating your position in relation to the cell phone towers to determine which tower
should service your Cell Phone GPS.

This is why we have Cell Phone GPS receivers in every cell phone. This generally determines location more accurately, although it doesn't work
as well indoors or in dense cities.
Cell Phone GPS can be used to keep from getting lost. A new generation of Cell Phone GPS devices that know your coordinates, along with some special mapping software, either downloaded upon request or resident on your phone, lets your phone double as a Cell Phone GPS system.

Cell Phone GPS is a marvel. The whole thing works because Cell Phone GPS can use cell tower triangulation to determine your location. Once you know the location, the rest is software.
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