I can chime in on this a little with some different insight. I fly small planes (172's etc) and I have a Bose bluetooth headset that allows me to take calls. With my rezound it was amazing where I could get coverage. Sometimes 5000 feet above the ground.
Yesterday I flew a normal flight path and was without data for most of the flight and without cell at times too. I was only 1500 feet above the ground. Verizon's bubbles are much larger than sprints. I can tell you that my phone with sprint was useless in the air at all. That was the number one reason I ended up on vzw.
I am hoping a radio update fixes some of these issues. For now, they are definitely flaky at best.
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