How I found the one ui beta for the s23 ultra?

[Hadamariposa]

Where I sign up for the beta?

[bengio]

You can't unfortunately. It's not available until April

[codename]

The beta is available now for s23 but only for U1 designated factory unlocked phones

[Inkdej]

On the Members home page, click the megaphone icon in the top right hand corner and you will have a DM from Samsung if you're eligible. I heard it's full about five hours ago, I just signed up about 10 hours ago myself.