The way calling cards in the US work is that the user calls an 800
number and then enters a PIN number and the number to be called. The
way 800 numbers work, the 800 number operator (ie, the company that
pays for it) gets a list of all the numbers that dialed it, because
he's paying.
It seems that it should be possible to create a "bugged" calling
card. You give this to someone as a "free prize" or whatever and then
you get a list of all the numbers he calls to and from using it.
Does anyone know if something like this exists, which I can buy? I
want to send someone a "present".
Thanks
