Quote:
Originally Posted by arparent
E911 GPS is not really GPS. It triangulates your approximate location based on cellular tower signals. It isn't useful for anything moving... like say, navigating while driving.
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NOT TRUE at all!
Sprint, Verizon, and Alltel
all use aGPS which is actually
better than stand-alone GPS in many cases. The aGPS gets an estimated position via data from the cell tower, then uses that to get a super-fast lock on satellites (since the phone already knows pretty much where it is, the initial lock doesn't take so long).
I guess if Spr0ckEt is right, it kinda sucks that it can't track you if you start moving, but an initial location is better than no location.
http://en.wikipedia.org/wiki/E911#Wireless_Enhanced_911