Someone already updated to android 11, in samsung galaxy s20 Ultra? with software version ATF2, from AT&T
My Android 10 upgraded March 29 2021. But my Android version stayed at Android 10. It was a security upgrade with some bug fixes. I don't want Android 11.
Go to your my att app and go to the live chat function and ask them what the hold up is. I bet it's something stupid like your phone never downloaded the first upgrade OS so it can't update software that is not there. They'll just send it again and you'll have to be on a wifi connection to upgrade. Att stores have free wifi fyi, and they can download and check for issues right there if you'd rather see a live person.