tony roberts wrote:

the greatest downside would be that it's illegal
to use a cellphone in an airborne GA aircraft in the USA

Digital versus analog phones. Supposedly the digital phones are not
covered by the FCC law since they do not flood the networks like the older
phones, as per many past threads in this group.

Consider, if you will, that the US airlines are tossing around the idea of
allowing passenger cell phone usage while en route.

--
Peter