One UI 6 third beta update for Galaxy S21 series has been expanded in the US. The South Korea & Indian users have received it recently, and the US users can now test it. In the new version, Samsung has squashed minor bugs and solved stability issues to go for stable software.
The firmware number ZWK4 has been seeded to the Galaxy S21 series. As per the official Schedule, it will get One UI 6 before the end of this year.