Patent ID: 8005464

Claim:
A portable cellular phone terminal device having a communication function for communicating via a network through a use of portable cellular phone services provided by a portable cellular phone service provider and an accessory function in addition to the communication function, the portable cellular phone terminal device comprising: a restriction information storage section for storing the accessory function and presence/absence information concerning whether utilization of the accessory function by the device itself is restricted; a restriction-lifting information storage section for storing the accessory function and a restriction-lifting condition for lifting restrictions on utilizing the accessory function based on a contract term as results of the use of the portable cellular phone services, the contract term being defined as a period of time during which a user of the device is under contract with the portable cellular phone service provider; a reading section for reading ID information from a storage media that stores ID information containing information required for connection to the network and is configured to be detachable; a writing section for writing information about the contract term as results of the use of the portable cellular phone services to the storage media; a restriction information writing section for updating the restriction information storage section based on the contract term as results of the use of the portable cellular phone services written to the storage media; and a control section for restricting utilization of the accessory function based on whether the utilization is restricted by referencing the restriction information storage section if the communication is impossible by use of the ID information.