The ipad uses a lot of 3g data when sleeping.
Today I quickly checked a map and then put the ipad to sleep, a couple of hours later when I turned the thing back on it had used up close to 1 gig of data!
How can this be stopped? I don't want to rely on having to manually have to turn cellular data off.
Apart from push notifications I don't expect any data to come through 3g when the ipad is sleeping.
iPad 2, iOS 4.3