Thank you for bringing this to our attention! If you received this text, and don't remember making any efforts to receive it, then it is likely tied to fraud/scams. If you didn't request a temporary PIN, please do not click on anything in that text message and/or do not use that PIN. This is a tactic spammers use to acquire account information. Instead, consider changing your password to be completely safe. Here are steps on how to do so.
Lastly, you can refer to our Fraud & Security resources page for additional support. It will provide tips on how to keep your account secure and safe. Please let us know if you have any further questions, or concerns!
Collin, AT&T Community Specialist
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*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.
My wife and I have been getting these as well, and discovered it's from the AT&T mobile security app. It was prompting for a pin. We have never had this happen before. And after requesting a pin directly from the app, the pin provided still did not work so we deleted the app. That's where I believe the messages are coming from. I don't see any benefit from the app anyway. Never solved any telemarketer issues. All it ever did was notify us of new software releases for the phone.
I had called AT&T about these because we had someone in Texas at a Best Buy hack our account and upgrade all of our phones, even while i was online with their fraud dept. telling them we were being hacked. So it seemed like a similar attack. She told me these messages were fraudulent. Even they don't know what's going on and they have no security to stop an attack. But that's another story.