Okay, sounds a bit high tec and James Bondy, but my friend a Tek head, who has way too much money and all the latest gadgets can get something called a TFR locater for £4973, not so sure if I said it right.
Basically its a cradel for your sim card and it can trace the exact position of a call or text you recieved within a month anywhere in the world, even if number is witheld. Basically say you recieve a call or text from your girlfriend 12 o'clock on a saturday night and she says she is in a bar with friends, you can take your chip out put it in a cradel sync it by bluetooth or usb to laptop and like a tomtom map find out exactly where that call or text was made, to know if she was telling the truth.
How mad is that, my first thoughts was... is it legal?
Guess you would never be cheated on with one of these or bosses could catch out their employees who want to pull a sicky
Gonna see him on sunday, to see if its true as googled it and nothing came up, he doesnt blag but I gotta see it, will take pics and post
Even does it if you cll them up,and they dont answer, as long as it rings, unless its switched off pin points exact location