I've been getting absolutely abysmal data using my 4S. It started about a week ago, going out here and there, but lately it's been being complexly unable for the web. It'll show 5 bars "4G" but almost always gets a "Can't go to address" message. I'll stick it in Airplane Mode, and then undo it, and then it'll show one measly bar, and no 4G sticker. Then it'll get to a few bars and the whole process starts all over again. Anyone experience similar problems. I'm in the Santa Barbara area if it helps. Also, I've only used 200 MBs of Unlimited/3GB plan.