With the number of threads on here of people complaining that their phones are magically sucking up large amounts of data, I thought there should be some clarification. The large amounts of data registering on bills at ~2 am is simply the system tallying the usage from the last tally. That said, I have noticed that based on the phones usage meter, mine and my wife's phone uses a little cellular data while connected to wifi. At first I thought it was only while in "sleep" mode. Icould reset statistics put it in sleep for a minute then I would wake it up and see "3G" at the top and it would quickly switch to wifi and I could see say 10kb sent and 4kb received. Later, I could see it going up without putting into sleep so not sure. It stops if I turn off cellular data. MY wifes phone does it too, but shes been staying around 1MB to 1.5MB a day, so I cant see this data usage to being more than 1 MB a day. Now, this only raises the quesion of what is going on here, as I still don't know if the data my phone is registering is even registering with ATT. I called ATT and surprise, they had no clue and claimed ot have never heard of it. They even sent me to their "techncal apple department". Anyone have ideas or other related observations? Please, no "OMGZ I never used more than 100MB a month and suddenly I use 200 in a week" posts unless you have thoroughly looked into it. Most of those posts have turned out to be a new app like audio or video streaming.