I'm pretty new to figuring out the data usage so don't slam me if this sounds uninformed. My data usage has never gone over 15 mbs in a single month over the last year but I was looking at my usage over the past 10 days since I got the ip4 and saw that I had already used 53 mbs. I did a search and saw that many others were reporting the same so I went into my data-used page on att.com and there was one single entry for 43,427 KBs . When I narrowed down the time I realized it was when I was on a one hour trip to Asheville, NC and I used the google maps with the blue GPS dot flashing the whole way. So that has to be what caused that large spike. Anyway....I had no idea that using google maps that way used so much data. I've used the app before but maybe I don't remember having that much data used. I did keep my unlimited data plan so it won't increase my bill but I thought I'd post this so if anyone else sees a big spike, this could be one of the reasons.