[JRandomFreeper]

They can only determine your location within the radius of the cell tower,

That turns out to not be the case... It has been 4 years since I worked in telecom, but at the beginning of 2002, I know that location accuracy without GPS enables was close to 100 meters, and much closer, if you have a GPS enabled phone.

/johnny

[Nathan Zachary]

Well, you'd hope a gps enabled phone would be accurate closer that 100 yards, otherwize it would be a crappy gps.
But just cell phone signals, maybe 100 yards in cities, where there are towers every block or more, but not anywhere within miles in rural areas. You'd have to study the test data and see what the tower density was.

They'd also be able to track your direction if you were moving while talking and roaming from one tower to the next.
In any case, if "they" had to go to all that trouble to find you, then you probably deserve to be caught and tossed in jail anyways.