While they provide bigger areas of coverage than low-orbit satellites, there’s a considerable transmission delay, or lag, because of their distance from Earth. Phones that work with low-orbit satellites also require less power than those that transmit to geosynchronous satellites, which means that additionally they are typically cheaper and smaller. Like with cellular telephones, transmissions to and from a satellite cellphone rely upon line-of-sight protection, which means that a cellphone have to be within the line of sight of a satellite. This signifies that the greatest way to speak using a satellite cellphone is to be exterior...