I have the 2gb plan. This has worked fine for a year until yesterday when our wifi went down and I turned off wifi so I could get my email. I forgot to turn wifi back on...big mistake.
Understand that I am only 15 days into my 2 gb. While i am asleep at 2:41am a message came saying I and 20% data remaining. At 3:05am, 9% remaining and at 3:37am 1%. In other words, while I and my iPad were asleep, it used 400 mb of data in one hour.
After turning wifi back on and renewing my data plan, I looked at what was running and closed everything out. The problem is that I really don't know what app was draining my data. The moral to the story is close your apps and turn it off (not just sleep) especially when not in wifi.
Understand that I am only 15 days into my 2 gb. While i am asleep at 2:41am a message came saying I and 20% data remaining. At 3:05am, 9% remaining and at 3:37am 1%. In other words, while I and my iPad were asleep, it used 400 mb of data in one hour.
After turning wifi back on and renewing my data plan, I looked at what was running and closed everything out. The problem is that I really don't know what app was draining my data. The moral to the story is close your apps and turn it off (not just sleep) especially when not in wifi.