1. A method of operating a cell phone network to control the functionality of cell phones of said network; said method comprising the steps of: creating a restriction data base defining restrictions associated with at least one possible geographical location of a cell phone in said cell phone network, each restriction specifying one or more cell phone functions; transmitting restrictions applicable to said cell phone currently in said at least one location; and controlling the operation of said cell phone in said one location in response to the receipt of said restrictions.