1. A method of initiating a call, the method comprising: receiving an identifier associated with a called party, the identifier being generated by a telephone handset; determining a network category associated with the called party; and generating an instruction operable to initiate a call by the telephone handset on a selected one of at least two networks accessible for communication by the telephone handset, wherein the selected one of the at least two networks is selected by the instruction in response to the determined network category associated with the called party.