Mobile communication network system and locking method of a mobile terminal apparatus

摘要

In a mobile communication network system for locking an operation on a cellular telephone comprised of a cellular telephone body, and an information storage medium that is inserted in the cellular telephone body and that is assigned a specific telephone number, provided are a service control apparatus 15 that associates a terminal identification number assigned to the cellular telephone 10 with the telephone number of the information storage medium currently inserted in the cellular telephone 10 to manage, and an information management server 17 which acquires a telephone number of the information storage medium corresponding to the terminal identification number of the cellular telephone 10 targeted for locking from the service control apparatus 15, and locks the operation on the cellular telephone 10 based on the telephone number.