Found this at the apple discussion boards:
" finally got my phone working properly in an area that I could not connect to 3G data, only with Edge. Here's my post from my original thread...
SOLVED!
After talking with a very helpful gentleman at AT&T yesterday, I fixed my issue! Seems as though my phone's profile in AT&T's system was the culprit. He looked into all the towers around the affected area, and everything seemed to be fine (Nokia equipment, not Lucent lol). So he wiped my config data from their system and pushed an update over the air. After a couple minutes, I turned on 3G again and tried loading a web page. It worked! Man, I'm so happy that I finally got the only issue I'm having with the phone resolved. Hopefully this helps anyone else out that is experiencing issues with data connectivity. Give AT&T a call, get an experienced tech and have them reset your data and push an over-the-air update to you."
What do you guys think ?