While we were in Mesa Verde National Park … which is in the middle of nowhere … I was able to get a reasonably good cellular phone signal from Verizon.
The signal tried to be digital (which would have been nice) … but after spending about 30 seconds each call trying, it gave up and switched over to analog. Luckily it was still Verizon analog, so there were no roaming charges.
Needless to say I was quite impressed with the cell coverage.