Information terminal deice and operation control method thereof

摘要

The present invention is directed to an information terminal device. A memory card 14 stores a serial number MID of the memory card 14 and a MID register program for registering the serial number MID in the information terminal device 10 . At starting the information terminal device 10 , the MID register program is downloaded from the installed memory card 14 and the serial number MID stored in the memory card 14 is stored in a non-volatile flash ROM 30 in accordance with the program. Then, the MID register program is cleared out of the memory card 14 and the MID register program on a SDRAM 32 downloaded to the information terminal device 10 is made invalid. Such processing prevents the serial number of the memory card 14 from being thereafter stored in the other information terminal device 10.