I've been trying to figure out what is killing my data since I got my iphone 5. It's LTE! I live in a 3G area and since fri I have used 25mb. I drove to work this morning and listened to a podcast like I always do. In 30 mins I had burned 706MB!!!!! I turned off LTE for the rest of the drive and used nothing after that. So basically, the one feature I have been so hyped about is useless. Really sad. As you can see its 9:25am in this pic. I left at 9:00 and checked before I left, it was at 25MB. I had no apps running in the bg and I disabled cell use for iTunes and everything else native.