This was incredibly helpful. Thanks for the video. I thought something was strange yesterday when I finished watching a movie in a theatre and noticed that my battery was almost drained. It had been nearly full before the movie. Then I woke up this morning and found a message from AT&T saying I had used 100% of my data, and I still had about 10 days left in my billing cycle. I've gone over my usage before, but it was always closer to the end of my cycle, and AT&T would always warn me at 60%, and then again at 90%. But this went straight to 100% without warning. When I checked how much data I used over my 2GB limit, I found it was over 1.7GB over! Something was very wrong. I called AT&T right away, and the customer service rep explained she had the same problem a while ago, but it was because of streaming services like Pandora or I Heart Radio--even when you're on a wifi signal, there's so much data pumping thru that it switches over to 4G without you knowing it. I thought that was really strange. But I had used Pandora for a few hours at home over wifi that day, so it kinda matched up with her story, but I still thought it was weird that it drained THAT much data. I had used Pandora over 4G before iOS 6 and never had that problem. The rep suggested that I turn off Cellular Data every time I got home or any place with a wifi connection. I told her that was kind of a ridiculously inconvenient solution, but she insisted that that was the problem and that's how to avoid it. She did graciously credit my account and made a note of the problem. So when I stumbled upon our video, I immediately tried it, and lo and behold, problem solved. Good on AT&T for the refund, but bad on them for the bad advice. Thanks again!