Anyone that upgraded from a 3G or 3GS notice significantly higher data usage on your new phone? I bought an iPhone4 with the 200MB data plan for the GF. The first day she blew through 90MB just playing on the web, no downloaded apps and no streaming of any youtube, pandora or anything like that. Checked usage before going to bed and it again in the morning and 4MB were used while we were both sleeping! Yesterday she completely shut off the internet connection and still managed to use 0.4MB without ever being ABLE to connect. WTF? Does AT&T default to having apps running in the background that suck down data hoping you don't pay attention and go over or force you to buy the 2GB plan?