Not getting the banner for the one UI 4 beta. I have an S21 Ultra that I bought as an originally unlocked Samsung device. U1 and XAA firmware. No banner.
I was in the beta and had to withdraw due to severe stability issues. Phone would frequently crash and restart without an identifiable cause. Went through all the troubleshooting offered on the community forum. Nothing worked. It has some cool features but I couldn't afford to have a nonfunctional phone. Probably the first and last beta I sign up for.