I've read about it and it's pretty interesting. I'd like to know more about the technical details of how that could work. You can pick up a satellite signal on a phone without much of a problem because it's a powerful transmitter but how does the return signal get to the satellite since it's a small device with a low-power transmitter designed for local communications? SAT phones usually are larger and have a much bigger external antenna so how can they do it on a normal smartphone is very interesting.