I stopped in right before closing and the guy who was there insisted that the problem is with the network right now. He said they have been having trouble with some Alltel towers interfering with their other towers and said for me to just sit tight until these network issues are resolved.Did you get a replacement card for the issue you were having?
In the store I had -63dBM with 4G which was better than both the display GNex and Razr so I felt pretty good about that.
As soon as I pulled out of the parking lot, the signal went to 3G so they must have a network extender or two or three in the store to get those kinds of signals.
I showed him my screen shots and he was clueless about them and said what is the app you have that generates those? I told him that it was just the settings that come on the phone. They were trying to close up so I didn't take any more of his time.