A handset device is described, which comprises a first radio transceiver for receiving status information from a medical device worn by a patient, the first radio transceiver being operable only while the handset device is in an active state, and a second radio transceiver for communicating the status information to a remote server, the second radio transceiver being inoperable when the handset device is in the active state. The handset device also comprises a controller, responsive to a first predetermined condition to transition the handset device from the active state to a low power state in which both the first radio transceiver and the second radio transceiver are inoperable. During the transition from the active state to the low power state, the second radio transceiver is used to communicate the status information to the remote server. This process enables status data to be synchronised periodically to the remote server without impairing the function of the medical device. More particularly, this process advantageously triggers synchronisation such that (a) the user does not have to take any action to cause synchronisation, (b) the synchronisation occurs at a time when it is safe for an RF transmission to the server to occur, and (c) the synchronisation is timely that is, updates are sent soon after they have been logged on the handset device.
