Has anybody done or heard of anybody doing this?? would this even work?? I have an old blackberry i am currently not using. I was thinking about putting a 12v accessory plug under my tail for a cell phone. I then was going to activate my old phone as a add-on to my account (i believe its $10 a month). I have been hearing about this app you can put on phones to check where ur family is at at all times. Why not put this app on my extra phone and hide it under the seat somewhere incase of it being stolen??? Is this dumb or is there another sevice that does this already that i am not aware of??