Samsung Galaxy S21 series now receives a new update (G99xBXXU1AUB6) and it comes with the February 2021 security update.
Changelog is not that descriptive, and like the update that came before it, it talks about improvements in overall performance, security and camera. Though Samsung does not say so explicitly, it appears that the update seeks to resolve power consumption issues caused by a recent update that some users on XDA forums that it has solved these problems.
The problem was also acknowledged by Samsung and it is said to be so working on a solution.
According to posts on Save your and Samsung Community forums, the previous firmware update significantly affected battery life. Apparently this was only a problem for Exynos-powered people Galaxy S21 and S21 Plus. Users had reported that putting the phone in flight mode solved the problem, meaning it had something to do with mobile connection.
The Snapdragon models and the Exynos-powered ones Galaxy S21 Ultra was allegedly not affected.
The new update is currently being rolled out to users in the UK, Switzerland, Belgium and Germany and is likely to reach more markets in the coming days. You can also check it manually by navigating to software update in Settings and pressing Download and install.