A firearm includes a firing mechanism and a sensor device. The sensor device includes a subscriber identity module configured to communicate with a server over a signaling channel of a wireless communications network. The Sensor device is configured to enable/disable the firing mechanism in accordance with instructions received by the SIM from the server. Movements and/or attempted operations of the firearm may be monitored using an application running on a mobile device, which application receives information concerning the firearm over the signaling channel of the wireless communications network.