Make sure an check latest security update is installed & also make sure your signed into Samsung members app with latest version of that also, remeber to register once you find the notice
Thanks for the tips. Sounds promising!
I tried checking for updates (running XEU), latest version of members app, signed into the members app. Restarting phone several times... nothing came up in the members app :( No notices, no familiar One UI Beta banner (I see while running the sideloaded 'update.zip').
Maybe I should give BTU a shot :/