My wife and I were 3gs people before the 4s. She is a stay at home mom and is on wifi around 80-90% of the time at the house. On the 3gs her usage was around 50 MB a month so we have her on the 200mb plan. Since the two weeks on the 4s she has used over 130 MB and is on pace to go over the 200 MB. Any thoughts on what is hogging the 3g data when the phone is sleeping?