Radium wrote:

...
Analog cell phones should stop using FM and should start using AM at
whatever practical radio frequencies available.
...

Soon (a few years, already begun) all analog phones will ceases to
exist; the bandwidth is just too valuable to use up with analog
modulation ...

JS

John Smith 1 reported Radium to write:
"Analog cell phones shoild stop using FM and should start using AM at
whatever practical radio frequency available."

Tune the FM band. Recovered audio is all about the same loudness. Tune
across the AM band. Even with stromg AVC action, loudness varies with
signal strength.

Loudness independent of carrier signal strength is a great advantage of
FM. Amateur FM repeaters allow hand helds with a few milliwatts output
sound about as loud as a base station with maximum allowed power output.

Imagine a cell phone in all the disadvantaged locations it encounteres
as it switches from repeater to repeater along its route. Loudness would
be nightmareish. Radium`s proposal won`t be satisfactory with analog
phones.

Best regards, Richard Harrison, KB5WZI