I've been on AT&T for about 2 years now, and have always used an iPhone since then. iPhone 5 for about 6 months now with the 5GB data plan. I've always stayed heavily within my limit (maybe 2-3GB used per month) but last month I went over. This has never happened and I can't explain it because I didn't use it any differently than I have in the previous months. I have the AT&T app on my phone and use it to track usage, pay the bil etc. So, a day before the end of my cycle I check my usage and it says I used up around 3.3GB (last updated that morning) and I just continue my day as I would. An hour later I get a text message from AT&T saying that I have reached 100% of my limit and that overages are charged at $10 per GB. This alarmed me and I gave them a call saying that this can't be since the app says that I'm still far away from exceeding my cap. They give me the standard BS "It takes some time to update and synchronize so the actual usage displayed in the app isn't always correct." - I agree with that statement, but it can't be that I spent 1.7GB in a few hours and that it was a sync delay. I didn't do anything out of the ordinary. Plus, it takes some significant effort to spend 1.7GB on an iPhone in such a short time. I feel like I'm being exploited by AT&T, and am wondering if anyone else has experienced this?