Controlling wireless device registration based on vehicle movement

A wireless communication device integrated with a vehicle, the vehicle having an ignition and a control system, the wireless communication device comprising:

• a transceiver for engaging in air interface communication with a serving radio network;
• a data interface for communicating with the control system;
• and
• a processing unit arranged to cause the wireless communication device to operate in a reduced-registration mode while the vehicle ignition is off, wherein, in the reduced-registration mode, the processing unit carries out functions comprising (i) receiving vehicle-movement data from the control system via the data interface, (ii) using the received data as a basis to make a determination of whether the vehicle has moved at least a threshold extent, (iii) causing the transceiver to engage in air interface registration with the radio network in response to the determination, if the determination is that the vehicle has moved at least the threshold extent, and (iv) not causing the transceiver to engage in air interface registration with the radio network in response to the determination, if the determination is that the vehicle has not moved at least the threshold extent.