wanted to chime in again here, I'm the OP of this thread:
I live in Colorado, where I've had the issue a lot, but for the past 3 or 4 weeks i've been staying with family in the Los Angeles area in California, also visiting friends and family in Orange County: Irvine, Huntington Beach, Palos Verdes, La Palma, etc.
We also drove cross country from Colorado to California for this trip.
Anyway, the entire time I've been here (and for the entire road trip on the way here) I have not had the issue once. Not a single time. It was happening to me about 1/4 to 1/3 of the time back home in Colorado.
I've used the phone in areas with excellent coverage, as well as marginal coverage, and I never had the issue on this trip. But I'm sure when I get back home to CO I will have it happen again. I also travel for work, have been to several other states, i.e Houston area in Texas, Seattle area in Washington, and never had the issue, but whenever I got back home to CO it would start happening again.
Just more info...