Patent ID: 6947763

Claim:
A portable telephone comprising: internal memory unit that is readable and writable and is contained inside the portable telephone; external memory unit that is readable, writable, and detachable; connector for connecting the external memory unit to a main body of the portable telephone; a display unit; and control unit connected so as to have access to both the internal and external memory units, the control unit being structured so as to be able to store one or more distinct information sets in either one of the internal memory unit and the external memory unit, the control unit also being structured so as to allow a first of either one of the internal memory unit and the external memory unit to transfer one or more of the distinct information sets stored in the first to the other, the control unit also being connected to the display unit so as to simultaneously display a plurality of unique identifiers, each corresponding to one of the distinct information sets; wherein the control unit controls the display unit so that a first indicia is displayed only with each unique identifier that corresponds to an information set that is stored in the external memory unit, when the external memory unit is connected to the connector.