Radio terminal apparatus, communication system, and method for acquiring contract authentication information

摘要

A radio terminal apparatus includes a transmission control unit transmitting an acquisition request for acquiring contract authentication information via a radio channel when a predetermined operation of acquiring the contract authentication information associated with a radio service provider providing a radio connection service is received; a reception unit receiving the contract authentication information transmitted via the radio channel in response to the acquisition request; and a control unit controlling writing the received contract authentication information in a retaining unit.