I normally leave LTE turned off because of the old data-leak issue, but recently I turned it back on, thinking, by now, that old data leak issue must have been resolved. Then, this morning I was awoken by the sound of receiving a text message - it was AT&T letting me know I have used 65% of my data limit. Well, it turns out I'm still running 6.0.1, which surprised me. I just assumed I would have been running the latest OS, but I have a lot of iOS devices, so I guess I just missed updating my phone. So, I'm taking care of that. But, my question is, how do I even find out what app is using so much data? I haven't been running any data-intensive apps as far as I know. I used weather channel a few days ago for just a few minutes, and otherwise, I really haven't been using my iPhone 5 for anything (not even calls.)