cause if you swap to a family plan its usually only 10 bucks a month and they tend to give you a free phone. Wouldn't take much to hardwire it to a switched battery wire for charging and then hook it up to one of those small cell antenna's for cars. I dunno beats the hell out of buying a lowjack w/ survice fee or buying a $600 or more alarm with GPS and paying a survice fee.
Not to mention get a handsfree kit for the car so when someone does steal it you can fuck with him. Just verbaly abuse the crap out of him and he couldn't do nothing about it except get out of the car!