Sorry if this has been asked a million times but I did a search of the forum and couldn't find any concrete answer/explanation. Does anyone know why the iPhone 4S (and 4 to a certain extent) use so much more data. I don't believe most of the theories that I found by googling, as most places seem to claim it is due to Siri and/or people using the phone more. I have friends who are very casual iphone users and when they upgraded to the 4S they continued to use their phone in exactly the same manner and amount. However they suddenly found they were going over their existing 500mb data plan which they usually only used around half of. The phone has to be doing something to eat into that data. I also don't believe it has anything to do with iOS 5, as I still have a 3GS and have noticed no difference in my data usage since upgrading to iOS 5. It's a big concern of mine as when I upgrade I don't want to have to pay even more a month for a bigger data plan. Is there any way to prevent such high data usage or is it just something we have to accept?