Columbia subject headings:
Cellular telephone services industry--Records and correspondence--Access control--United States.
Cellular telephone systems--Security measures--United States.
Consumer protection--United States.
Privacy, Right of--United States.
Harvard subject headings:
Cell phone services industry--Records and correspondence--Access control--United States.
Cell phone systems--Security measures--United States.
Consumer protection--United States
Privacy, Right of--United States
Witnesses.
Princeton subject headings:
Cell phone services industry--Records and correspondence--Access control--United States.
Cell phone systems--Security measures--United States.
Consumer protection--United States.
Privacy, Right of--United States.