Welcome to Android Central! From Google Translate: "My Samsung Note 20 Ultra US AT&T does not update to Android 12
I am from Peru and I have a Samsung note 20 ultra AT&T USA, where can I get the correct firmware. Model, SM-N986U"
You probably have the correct firmware already. I think AT&T requires the phone to be on their network to get the official update. @
mustang7757, can you confirm that?
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