I was just looking at my att statement online and I noticed that every single day I'm showing some type of data usage for internet. The problem is that on several of those days I never left my house where I have wifi. The only time I used the phone for data was within 20 feet of the router so I know I was always on wifi. I do have a microcell because of no 3G service in my area but my understanding is that would only be used for data if I turned off my wifi on the iphone. The good news is that I have the unlimited data plan so I won't ever be charged extra but I'm just curious how I could be racking up data usage when I'm on wifi. Is there something I'm not thinking of ?