Sport Pilot wrote:

I think the FAA has an AC which tells the owners/operators the
potential dangers of using them. Thus the commercial carriers ban
thier use. Up to GA pilots to determine that for themself. Doubt it
would ever be a problem for VFR.

No, the FCC bans use of cell phones in the air. The FAA has a blanket statement
about "electronic devices" but makes no statements whatsoever specific to cell
phones. The FCC ban has nothing to do with danger to the aircraft or whether
they will work in the air. The problem is that some of the older ground systems
have problems with a phone in the air. It reaches multiple receivers (cells) and
causes conflicts on the ground.

George Patterson
The desire for safety stands against every great and noble enterprise.