I agree that it's a Verizon problem -- or, more precisely, a the-way-Verizon-speaks-to-Motorola-4G-phones problem. (Been through this when I went through 2 Bionics before they sent me a RAZR -- as these are supposed to be more stable, what with being on ICS.)
Last Friday, at Dodger Stadium -- Dodger freakin' stadium -- I went from 4 bars on LTE to no signal at all and everything in between (a 3G signal, and, at one point, a 1X one(!)). The phone in the hand of the person to my left had no such issues -- she's on Verizon, but I'm honestly not sure if it was a 4G phone. Still, she held a data connection solidly, which is more than my RAZR could.