So I got my iPhone 5 last week and now I got a text message this morning saying I've used more than 50% of my 2GB of data. Now i've pretty much been home and I always have my phone on WiFi .. I'm not even on the internet with it that much or at all when I'm home. On my last phone, with unlimited data I only used about 1 GB in the overall month and not in the first few days of having it. What could be going on?