I'm sure it's a matter of time before they gain access to smartphones.
The problem there is uplink. Your phone can hear satellites all day long, as it does with GPS (also radio) but you need both a real antenna, and a power budget that is not coming from a phone, to be heard by the bird.
Sorry I jumped your case, I was arguing with someone just the other day that insisted that their smartphone was not a "radio"
SDR is ONLY for receiving or very short range tx.
yeah, they need to flesh this out better...right now I smell