I recieved a text message from this phone number saying congratulations you have won 100.00 off your next bill.   http//a.az50offer.com   which does not exist.   and the number rings and goes straight to busy.

I received a text about winning $100 off my next bill. Unsolicited and unwanted. Obviously not AT&T but a scammer of some sort. I called the number so I could add it to my blacklist, not sure if it prevents texts though.