Samsung
Samsung has released the October 2023 security update for the Galaxy S21 series, following the Galaxy S22 and S23. The update, which has firmware version G998WVLS9EWI6 in Canada, is currently available in the country and the US and will soon reach other markets.
The October 2023 security patch fixes many security issues in Android and Samsung’s One UI software. Google and Samsung developed the fixes for their respective products. You can get the update on your Galaxy S21, S21+, or S21 Ultra if you live in Canada or the US. Go to Settings » Software update and tap Download and install. You can also download the firmware file from our database and flash it yourself.