Check out my thread...
http://www.blackberryforums.com/netw...rk-issues.html
I called at&t datat support back again. They transferred me over to RIM. RIM sent me back over to at&t because they thought it was network issue. My issue was sent over to the network engineers. I got a message on Friday afternoon saying that someone was out to fix an issue on one of the local towers. I am still having the same problem...