Satellite cell phones ( http://www.satellitespectrum.com/satellite-cell-phones/ ) are mobile phones that communications directly with satellites, rather than going through normal cellular networks. Communication is established using a large rectangular antenna that is built into each phone. Although quite bulky in appearance satellite cell phones are still small enough to be transported fairly easily.

The main advantage of satellite phones over normal cellular technology is that they can theoretically be used anywhere in the world, no matter how remote the location. This is due to the fact that they receive their signals from orbiting satellites, not fixed-location cell phone towers.