Cell coverage isn’t always reliable. When you don’t have any bars and you’re in a remote area, out at sea, on a business trip in an area with unreliable cell service, or hiking canyons, your cell phone won’t help you. But a satellite communications device or satellite phone will.
Satellite devices and satellite-enabled smartphones may work worldwide, regardless of cellular networks. These devices rely on a system, or constellation, of communication satellites in various types of earth orbit.
