My experience (Treo 600 Sprint) has been that SMS messaging and email
work but voice calls rarely work above 2-3K. And that's independent of
the number of bars - 1 or better seems make txt messages work.

I would be interested in hearing about your voice experienc

Newps wrote:


On a related issue I recently upgraded my phone to a Treo 600. I am a
Verizon customer. This phone is digital only, no analog service. I
flew to the Twin Cities and back in the last week. Eastbound I was at
7500 MSL about half the way and then about 3500 MSL the rest of the way.
Westbound I was at about 1500 AGL all the way to keep my tailwind. I
haven't received my adapter yet for my Cellset so I didn't make any
phone calls. I checked my email about 25 times in each direction. If I
had three or more bars the phone would connect and send or receive
email. If I had two it was hit or miss. Never with one bar. Until I
get my connector for my cellset I will assume a phone call will work the
same as a data call.