Unlocked Note9 - What determines code train?

[johnpjackson]

I bought my Note9 512 direct from Samsung.  How come it runs the TFN version of OneUI, instead of a version that is NOT carrier specific/associated?

[SamsungUSABetaTeam]

Thank you for your post. We appreciate your contribution to the Beta community.

[johnpjackson]

I asked a question.