Our system is designed to locate a CareRing anywhere within the expansive AT&T service area in the United States and the Rogers Network in Canada. It will also work anywhere in the world that offers GSM network coverage through a roaming agreement with AT&T If the device enters an area without coverage, the GPS feature will not be able to report it’s current location until it re-enters an area with network coverage. Once it reconnects, it will transmit a history of its locations that you can view online.