Yep. AT&T 2G GSM networks will be shut down in a few weeks (Dec 31st). This means more than just AT&T phones. Cricket, GoPhone, Straight Talk, and Tracfone, to name a few, all have GSM phones that run on AT&T's network. Upgrade your phones if you have any of the older ones.
What does that mean for me and my Nokia 5190?
Woody