I can see how the satellite has enough power to broadcast to the phone, but it's perplexing to me how the phone has enough power to broadcast to the satellite, especially when it comes to these small modern satellite phones. They don't seem to even be aiming the signal. Just from my experience with the range of radio signals coming from relatively small devices (wi-fi routers, cell phones, etc...), I would think that it wouldn't be even close to possible to send signals to the satellite, but I'm obviously wrong! I am guessing that the frequency of the signal has a lot to do with it. What am I missing? Anyone with a back of the envelope justification for this?