The Motorola Defy Satellite Link adds satellite communication to your smartphone via Bluetooth technology allowing you to send messages over satellite wherever cellular service is sparse or just not available. This satellite messaging device offers an added layer of security with a reliable SOS emergency button if a critical situation arises. Share your location with people back home, putting their minds at ease, while you work, explore, or play beyond the fringe of cellular coverage. The Bullitt satellite messenger app provides true two-way messaging with a direct-to-satellite service which meets the industry’s rigorous 3GPP standards. SOS assist is a satellite service giving explorers a reliable lifeline, small enough to fit into a pocket or hang from a backpack, wherever they roam and is always ready for whatever might go wrong.