| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve convenience at operating a portable telephone set by using data stored in an IC card. <P>SOLUTION: When an SIM card 22 is mounted, a card case 1 reads telephone ID from the mounted SIM card 22, and transmits the read telephone ID to portable telephone sets 23 and 24 corresponding to the SIM card. At operating the portable telephone sets 23 and 24, the SIM card 22 does not need to be mounted on the portable telephone sets 23 and 24 and only the SIM card 22 needs to be mounted on the card case 1. thus, it is not necessary to switch the SIM card 22 from the portable telephone set 23 to the portable telephone set 24 at every time of sharing one SIM card 22 by the plurality of portable telephone sets 23 and 24. <P>COPYRIGHT: (C)2003,JPO |
