Samsung is pushing a new One UI update for the unlocked models of Galaxy S21, Galaxy S21 Plus, and Galaxy S21 Ultra devices in the US, which brings fixes and optimizations of the November 2023 Android security patch.
This latest update will improve the core mechanism of your Galaxy phone and offer enhanced security ensuring that user data and sensitive information remain safe. It further addresses 65 vulnerability exposures to maintain the device’s reliability.
Moving on, the consumers of unlocked Samsung Galaxy S21, Galaxy S21+, and Galaxy S21 Ultra will be able to determine the November 2023 update via the One UI build version G991U1UES9EWK1, G996U1UES9EWK1, and G998U1UES9EWK1 respectively.
However, the update is released gradually and will take some hours to become available on all eligible units. Therefore, you can even check for the patch manually and download it immediately through Settings > Software Update > Download & Install.
