Lately ever since I upgraded to an iPhone 5, I've been getting lots of data overage charges. Apparently, in 1 day when I was stuck at home sick and connected to wifi all day, I'd used up 200 MB of data. I don't understand this because I was home all day and not once did I turn off wifi, so how was any data being used at all? I've had my iPhone for about 2 months now and both months I have gone over my 300 MB data usage. Before I had my iPhone 5, I would only use about 250 MB of data or so and I haven't changed my data using habits since then. I don't use a lot of data, I only check a couple websites a day and usually everywhere I go, like school, has wifi, and I make sure to connect to it. I don't understand how I could be using so much data when I always have wifi on. Just to clarify, I am using an iPhone 5 with iOS 6 with AT&T. Has anyone else been having these issues, and if so, then how do you fix it?