illegal because early cell-co's bugged FCC bugged FAA
When cellphones first came out, the service providers discovered one phone at 39,000 feet could utterly confuse the cell-transmitter-computers by logging on--every few seconds--from 50 cities simultaneously.
So they went to FCC and said "Stop them!"
And the FCC went to the FAA and said "Simon Says Stop Them!
And the FAA said "Stop!"
And nobody paid any attention,.
So the carriers improved their computers to alleviate the problem.
But no law once on the books ever gets retracted . . .
('struth--my dad worked for Bell Labs for 35 years, got the inside track . . .)