They're tracking you

[SYNTuesday]

It's acually kind of cool. I read an article on this. Thing is the cell phone companies' software keeps track of the nearest broadcast tower so they can give you the clearest signal. As they experience a signal drop, they make the phone put out a call to all towers, and the one they get the strongest reading from, they know you're closer to that one. In dowtown manhattan they can track you to the nearest block by this method. Even when you're not talking, the phone periodically sends out a test signal, so if someone calls, theyll be able to direct the signal to you best.