Abstract: A radio (e.g. a cellular radio telephone) is provided which is capable of operating with a set of incoming and outgoing call functions. Removable memory means 132 are provided (e.g. a smart card) for storing radio function selecting information 133 and a radio user validation code. The radio communicates with a radio communications system in response to the code for enabling the radio to receive incoming calls at least. Radio function control means activate a subset of the call functions within the set of call functions in response to the radio function selecting information stored in the removable memory means.

Abstract: A radio (2) having: a first memory (34) for storing first information items; memory receiving slot (18) for temporarily receiving a second memory (20, 36) for storing second items of information; microprocessor (30) for accessing both said first and second memories; and user selective transfer device (42, 44) for causing an information item from one of the memories to be transferred to the other of the memories. In a preferred form the radio is a radiotelephone, the first and second items of information are telephone numbers and the second memory is a magnetic card or a smart card.