persistent pop-up: "TEST of AT&T Wireless Emergency Alerting System..."

[Members_GEgGRq8]

Am I the only one receiving these pop-up messages many times per day that pretend to be "...a TEST of AT&T Wireless Emergency Alerting System. Please ignore the message. AT&T is going to be testing the 360 char Alert Text with WEA Alerts. If you receive this Alert please disregard it..."   The message is basically the same every time and it's become very annoying.

I think it's a virus and I've done everything I can think of to stop it. Any suggestions?

[meself]

Others have reported it also perhaps they are testing or working on there system

[Members_GEgGRq8]

Thank you for responding. Yes, possibly AT&T is doing something.

[meself]

Matter of when it gets finished