Samsung Galaxy S21 Ultra (SM-G998U) firmware for Unknown (LLA): 2 builds in the SamMobile archive, newest first. The latest is G998USQU9EWI3 (Android 13, built 6 October 2023). Open a build to download it, or switch region with the country selector.
We recommend using Samsung’s own utilities, Samsung Smart Switch and OTA (Over-the-air), to upgrade devices. Use SamMobile only if you are 100% sure about the risks involved in flashing
your device. SamMobile is not responsible for any damage caused by using the files on this website.
