Beginning of Essay
The cellular/mobile phone system is one that is perfectly set up to be exploited by phreaks with the proper knowledge and equipment. Thanks to deregulation, the regional BOC's (Bell Operating Companies) are scattered and do not communicate much with each other. ....

Middle of Essay
.... new electronic identity, and use that instead. How does the cellular system know who is calling, and where they are? When a mobile phone enters a cell's area of transmission, it transmits its phone number and its 8 digit ID number to that cell, who will keep track of it until it gets far enough away that the sound quality is sufficiently diminished, and then the phone is "handed off" to the cell that the customer has walked or driven into. This process continues as long as the phone has power and is turned on. If the phone is turned off (or the car is), someone attempting to call the mobile phone will receive a recording along the lines of "T ....