There was no violation of privacy here. To prove there was, you would have to prove that your private and/or personal information was publicised. Which did not happen! Moreover, you would have to prove that you suffered some damages as a result of this perceived privacy violation, which did not happen either.
Here is a link to AT&T's Privacy Policy Commitment, which states:
Our Privacy CommitmentsOur privacy commitments are fundamental to the way we do business every day. These apply to everyone who has a relationship with us - including customers (wireless, Internet, digital TV, and telephone) and Web site visitors.
We will protect your privacy and keep your personal information safe. We use encryption and other security safeguards to protect customer data.
We will not sell your personal information to anyone, for any purpose. Period.
We will fully disclose our privacy policy in plain language, and make our policy easily accessible to you.
We will notify you of revisions to our privacy policy, in advance. No surprises.
You have choices about how AT&T uses your information for marketing purposes. Customers are in control.
We want to hear from you. You can send us questions or feedback on our privacy policy.