A mobile apparatus includes a removable SIM chip card having
data-processing means intended among other things for storing
identification data of a subscriber in a GSM mobile radio network. The
mobile apparatus has additionally at least one wireless interface
integrated in the housing. The interface may be infrared or inductive. By
means of this interface, the SIM card can communicate directly, without
making use of the mobile radio network, with an outside device in both
directions. The chip card contains additionally a communication controller
to encrypt data and transmit them via the interface. The contactless
interface may preferably be fed independently of the mobile apparatus.
