Apparatus for telephone communication; apparatus for transmitting data by the telephone network; apparatus for transmitting data via the telephone; apparatus for transmitting messages via the telephone; car telephones; cellular mobile telephones; cellular radio telephone apparatus; cellular radio telephone instruments; cellular telephones; computer apparatus for the transmission of telephone calls; cordless telephones; digital telephone sets; electronic telephones; multifunctional telephones; rechargeable cellular telephone batteries; telephone apparatus adapted for use on credit; telephone apparatus incorporating monitors; telephone appliances; telephone handsets; telephone receivers; wireless telephones