Brent, I was up at Glacier National Park, using my Verizon tri-mode phone alot. Ppl kept coming up to me with astonished expressions that ANY type of phone would work there. I think it is the tri-mode, which uses analog satellite if the digital is not available (I think...) that makes that possible. Since I live on a farm, there is no digital service at the farm. So just having a Verizon or whatever brand name phone is not as critical as the phone's being "Tri- Mode" ..... John