I did the same this afternoon, but I informed them that my number was on the US DNC list and that I was not an AT&T customer.  I then sent a letter to AT&T regarding ETech, that I was not an AT&A customer, but if I were, I would terminate the relationship; that my number was on the DNC; that if I received further calls on AT&T's behalf, I would file a complaint with the FTC and the Virginia small claims court.  I don't know if this is the correct e-mail, but the address on AT&T's privacy website is privacypolicy@ATT.com.  Maybe if enough people write AT&T, they will realize that this is not the best marketing approach. If you are an AT&t/Bellsouth customer, I recommend that you check their privacy policy.