A radio terminal apparatus comprising: a transmission control unit configured to transmit an information acquisition request via a radio channel when a predetermined operation of acquiring contract authentication information associated with a radio service provider providing a radio connection service is received; a reception unit; and a control unit, wherein the information acquisition request includes location information acquired by the radio terminal apparatus or location information corresponding to a location of a base station to which the radio terminal apparatus is connected, wherein the reception unit is configured to receive radio service provider information regarding a plurality of radio service providers selected based on the location information included in the information acquisition request, wherein the control unit is configured to display a choice between a manual selection and an automatic selection, wherein when the manual selection is selected the control unit is configured to display the received radio service provider information on a display unit and when the automatic selection is selected the control unit is configured to display a plurality of preference conditions on the display unit, wherein the transmission control unit is configured to transmit an information delivery request, wherein the transmission control unit is configured to transmit the information delivery request for acquiring the contract authentication information associated with the selected radio service provider, when receiving a selection operation of selecting a desired radio service provider among the plurality of radio service providers associated with the radio service provider information displayed on the display unit, wherein the transmission control unit is configured to transmit, the information delivery request for acquiring contract authentication information associated with the radio service provider automatically selected on the basis of the selected preference condition, when receiving a selection operation of selecting a preference condition displayed on the display unit, wherein the reception unit is configured to receive the contract authentication information transmitted via the radio channel in response to the information delivery request, and wherein the control unit is configured to control writing the received contract authentication information in a retaining unit. a transmission control unit configured to transmit an information acquisition request via a radio channel when a predetermined operation of acquiring contract authentication information associated with a radio service provider providing a radio connection service is received; a reception unit; and a control unit, wherein the information acquisition request includes location information acquired by the radio terminal apparatus or location information corresponding to a location of a base station to which the radio terminal apparatus is connected, wherein the reception unit is configured to receive radio service provider information regarding a plurality of radio service providers selected based on the location information included in the information acquisition request, wherein the control unit is configured to display a choice between a manual selection and an automatic selection, wherein when the manual selection is selected the control unit is configured to display the received radio service provider information on a display unit and when the automatic selection is selected the control unit is configured to display a plurality of preference conditions on the display unit, wherein the transmission control unit is configured to transmit an information delivery request, wherein the transmission control unit is configured to transmit the information delivery request for acquiring the contract authentication information associated with the selected radio service provider, when receiving a selection operation of selecting a desired radio service provider among the plurality of radio service providers associated with the radio service provider information displayed on the display unit, wherein the transmission control unit is configured to transmit, the information delivery request for acquiring contract authentication information associated with the radio service provider automatically selected on the basis of the selected preference condition, when receiving a selection operation of selecting a preference condition displayed on the display unit, wherein the reception unit is configured to receive the contract authentication information transmitted via the radio channel in response to the information delivery request, and wherein the control unit is configured to control writing the received contract authentication information in a retaining unit.