If you are an AT&T Customer and you upgraded to an iPhone 4S this weekend you might want to check your account settings. Something fishy is going on with customer messaging plans. I got wind of it from a friend who is currently traveling in Alaska.
Apparently if you previously had Messaging Unlimited with Mobile to Any Mobile Calling on your old phone you’ll find out like I did that AT&T switched you to the Messaging Unlimited plan. That plan does not including the Any Mobile to Mobile calling feature.