AT&T wireless users in the Midwest and Southeast had trouble accessing 3G and EDGE networks from certain smartphones and laptop data cards. AT&T said the problem has not affected users in the Northeast or far West and has not affected voice services anywhere. Users have reported problems with the iPhone, BlackBerry and Palm Treo on online discussion boards.

"We are working to identify the cause of the problem as quickly as we can," an AT&T spokesperson said yesterday. "And we apologize for any inconvenience to customers."

For more on the outage:
- read this article from CNET