Hello everyone!! I've been a MacRumors reader for quite a few months and I decided to join the discussion. So this is my first post!!! Here's something that concerns me a lot with my new iPhone 4. I went from a 2nd gen iPhone (3g) to the i4. I've had a data usage that only once reached 140Mb and usually was around 85Mb (as you can see in the picture). When AT&T mad announced the new data plans I thought I could save my self some money and switched from the unlimited to the 200Mb plan. This happened exactly one month ago and my billing cycle is every 14th. I've had the iPhone 4 since the launch day (aprox 2 weeks) and suddenly today AT&T tells me I've used my 200Mb and charged me another 200Mb!!!! Before I start getting really mad with AT&T I'd like your advice. Is this normal with iPhone 4? Does multitasking mean that an app running in the background continues to use data? What else could be the fault? I'm asking because I honestly haven't changed my habits with iPhone 4 and didn't use 3g data that much. I don't tether or anything like this. Has anyone else noticed increased data usage with iPhone 4? Looking forward to your posts. Thank you!!!