The Galaxy S9 series is the latest in line to receive the March 2020 security patch via a new firmware update. The package is now being distributed to both the Galaxy S9 and S9+ in a wide variety of markets including the Nordic and Baltic regions as well as various other European countries.
The Galaxy S9 series continues to receive new security updates every month. The March 2020 security patch comes roughly three weeks after the February release and should address a variety of issues including dozens of Android OS vulnerabilities and 25 vulnerabilities found within Samsung's own software.
The latest firmware update doesn't seem to add any new features to improve the Galaxy S9 user experience directly, so it's here mostly to introduce the March 2020 security patch. Galaxy S9 and Galaxy S9+ owners can wait for the update notification to arrive, if it hasn't already, or they can open the Settings app on the phone, navigate to Software update and tapping Download and install.
Even better, if those methods don't work for you or if the update still eludes your market, you can refer to our firmware archive, download the latest Galaxy S9 update for your device from there and apply it to your phone manually using a Windows PC.