On Thursday, May 3, 2018 at 4:04:35 PM UTC-4, Charlie M. (UH & 002 owner/pilot) wrote:
I believe the FCC rule (in the US) is to NOT make/receive calls from a cellphone in the air. Major reason is potential swamping of multiple cell towers from a single phone, thus maybe blocking other calls.
Data through the same system uses quite a bit less bandwidth.

At least, that is my understanding.

Are you saying voice calls not OK, data OK from the air? How about text messages (also low bandwidth)? Of course, SOME data uses ARE high bandwidth (watch Netflix?), but I agree that the packets sent out by IGCdroid are low-bandwidth. The FCC rule may not differentiate those though.