they get the phone ID from the cell tower, then go to your provider for your name.
if you meant trace it to where you are using it, no, unless they really want you bad. they can only get to the nearest tower, unless they borrow an AWAC from the air force.
http://en.wikipedia.org/wiki/AWACS#AWACS
they killed a terrorist that way, put a bomb in his phone, listened in on his calls,blew his head off when he got on the phone.
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