Asking how much data someone else uses a month is like asking them how much gas they use a month, it means nothing is relation to how much you would use. There are many variable. #1 is data speeds. Then you have different uses. You may just browse the web and check the weather, others may stream music all day and watch netflix in the evenings obviously using vastly more data. It's all going to vary on the person. I use consistently twice as much data as my wife, so does that mean the 4S uses twice as much data as the 4? Of course not.