Mxsmanic wrote:

The irrational prohibitions are those against devices that are not
transmitters, such as laptops, GPS receivers, and the like. But most
air crews haven't a clue in this domain so they ride on superstition;
some airlines do the same.


You would think that the digital cell phones would be low power
enough, yet my GSM cell phones have always annoyed the hell out
of come low level audio (portable MP3 player docks and the like).
The sound is pretty distinctive. It's even gotten into my airplane
audio. It's a reminder for me to shut off my phone.