A radio handset which includes a processor having a memory, for performing the functions of the handset by communicating between originating entities and destination entities. Some of the entities being within the handset and at least one being locatable within an ancillary device. The handset further includes an interface coupled to the processor having a radio transceiver arranged for coupling to the ancillary device and communicating therewith to enhance the functions of the handset, and routing apparatus, coupled to the processor. The routing apparatus is arranged to provide communication between an entity in the handset and an entity in the ancillary device by enabling the creation of a proxy entity in the handset for transaction with the entity in the handset.