"Peter R." wrote in message
...
Casey Wilson wrote:

. I do, however, turn it off when I can remember
because of the purported (implied) problems associated with the
cell-phone system on the ground.

I do, too, but also because I read that the phone's battery can be
prematurely drained while the phone keeps attempting to make contact
with the cell node (or some explanation like that).


Because it shifts to analog mode when it can't get a digital signal. Analog
mode require much more power from the battery than digital mode.