Is anyone else experiencing insanely high data usage on the iPhone 5? I've just come from a 3GS where I averaged 150-200mb a month. My sim activated 3 hours ago, and within an hour after leaving my house (where I was connected to wifi) my phone has used over 200MB of data, in under an hour, and all I did was send a couple of imessages. Surely there is something wrong here, is the phone doing something in the background that I can stop it from doing. I do have iTunes match turned on but its set not to use cellular data. This is totally crazy, I only get 500MB a month, im set to use more than this in one afternoon!