Abstract: A communication device electrically connecting to a vehicle including an engine performs a periodic network search to search for a predetermined network when a network currently used by the communication device is not the predetermined network. The communication device restricts performance of the periodic network search during an off period in which the power source is in an off state.

Abstract: A communication device that attaches to a network and performs radio communication, the communication device is configured to receive, from the network, a reject message indicating rejection in response to a request from the communication device to the network or a request for a detach from the network. The communication device is configured to transmit an attach request message to the network. The communication device configured to determine that a state of a service contract with respect to the network is a contract-canceled state when a first condition is satisfied and then a second condition is satisfied, wherein the first condition is a condition that the receiver consecutively receives the reject message from the network over a predetermined time period, and the second condition is a condition that the attach request message transmitted by the transmitter is rejected by the network.

Abstract: A radio communication equipment comprises an information card configured to record information on a service subscription provided by a network operator, a radio communicator configured to receive notification information of cancellation for the subscription by short message service (SMS) via radio communication, and a controller configured to notify that a subscription to a network operator corresponding to the information card has been cancelled, in response to the notification information received by the SMS.

Abstract: A communication device electrically connecting to a vehicle including an engine performs a periodic network search to search for a predetermined network when a network currently used by the communication device is not the predetermined network. The communication device restricts performance of the periodic network search during an off period in which the power source is in an off state.

Abstract: A communication device that attaches to a network and performs radio communication, the communication device is configured to receive, from the network, a reject message indicating rejection in response to a request from the communication device to the network or a request for a detach from the network. The communication device is configured to transmit an attach request message to the network. The communication device configured to determine that a state of a service contract with respect to the network is a contract-canceled state when a first condition is satisfied and then a second condition is satisfied, wherein the first condition is a condition that the receiver consecutively receives the reject message from the network over a predetermined time period, and the second condition is a condition that the attach request message transmitted by the transmitter is rejected by the network.

Abstract: A radio communication equipment installed on a vehicle, comprises a radio communicator configured to perform radio communication with a network, and a controller configured to perform location registration and emergency call origination to a public safety answering point (PSAP) as an emergency call process via the network, in which the controller is configured to perform any one of termination of the emergency call process or continuation of the emergency call process, according to a failure cause value notified via the network, when at least one of the location registration and the emergency call origination is failed when the emergency call process is performed via the network in occurrence of an emergency situation.

Abstract: A radio communication equipment comprises an information card configured to record information on a service subscription provided by a network operator, a radio communicator configured to receive notification information of cancellation for the subscription by short message service (SMS) via radio communication, and a controller configured to notify that a subscription to a network operator corresponding to the information card has been cancelled, in response to the notification information received by the SMS.

Abstract: A radio communication equipment installed on a vehicle, comprises a radio communicator configured to perform radio communication with a network, and a controller configured to perform location registration and emergency call origination to a public safety answering point (PSAP) as an emergency call process via the network, in which the controller is configured to perform any one of termination of the emergency call process or continuation of the emergency call process, according to a failure cause value notified via the network, when at least one of the location registration and the emergency call origination is failed when the emergency call process is performed via the network in occurrence of an emergency situation.