Yep. After repeatedly calling AT&TWS (starting in May) to ask them to
stop sending SMS from AT&TWS to my cellular with messages like...

From: alert@attws.com Welcome to Office Online! To setup mobile access
to work email, go to www.attws.com/officeonline on your PC and click
"Configure your account"

From: 9269 AT&T Wireless: Your wireless phone can now make
international calls in the US or while traveling overseas. Visit
attwireless.com/worldconnecting for rates/info

...some woman named "Uma" left a voice mail saying, and I quote:

"All text messages from AT&T Wireless are blocked except those that are
service-impacting issues, and those we cannot stop. Part of them are as
a result of FCC regulations (1) and again, the only time that you are
text messaged is whenever there is a service-impacting such as, um,
adding a feature(2) or an outage in your area (3). Those are the only
times that you would be, that you would be text messaged by AT&T
Wireless, we cannot stop those, you are not charged for them and you do
not need to reply to them."

So, according to "Uma," there's apparently some FCC regulation that
requires AT&T to SMS a customer's phone to tell them when they can or
cannot send international calls - or something like that.

The two messages above occurred after my fifth call to Customer Care to
get the messages to stop. I made the mistake of believing a "Resolution
Specialist" named "Megan" when she assured me that they'd been stopped,
and even gave me a phone number where I could supposedly reach her.

Needless to say, she was not reachable at that number.

For comparison, any time I've called AT&TWS Customer Care in the last
six months, I've spent at least 25 minutes on hold, and I've
occasionally spent an hour on hold. After spending all that time on
hold, I'm expected to repeat all of the same statements and requests I
made during the last call - which might have made sense if any
representative had actually understood and followed through on the
requests instead of lying to me and saying it had been taken care of.

In my week on T-Mobile, I've had to call Customer Service twice for
issues related to porting the number from AT&TWS to T-Mobile. In both
cases, I was talking to live, intelligent human within five minutes of
dialing the number. Also, in both cases, the particular issue was
resolved before the end of the call. No escalations to nonexistent
"managers," "supervisors," or "Resolution Specialists" who can't
resolve anything.

I was an AT&TWS customer for six or seven years before I made the
mistake of switching to GSM - it's like they took all of the AT&TWS
employees, and gave them an IQ test. Then they took the bottom 15% of
the scores, and assigned them to GSM Customer Care without any training
at all.

At this point, I'm just waiting for some AT&TWS twit to call my cell
number to try to sell me something. I think I made it pretty darned
clear during my last conversation with AT&TWS that they'd better not
contact me for any reason at all.