iPhone application transferring huge sums of data
I have some random iPhone application transferring tons of data from my phone, even when the phone is asleep. It appears to happen once per day, around 5-6pm and for example last night it 'sent' 75mb of data out. At a 200mb cap, this is pretty scary. How can I find out which app is doing this?
AT&T was useless and suggested Apple was doing this. Even though all of our iphone updates are manual, and that would be a 'receive' not a send.
It's an iPhone 4 running the latest operating system.
iPhone 4, iOS 5.1.1