The Galaxy S9 and Galaxy S9+ received the November 2019 security update on the unlocked Exynos-powered models earlier this month, and North American carrier T-Mobile is now pushing out the update to the two phones as well. The update comes with software version G960USQS7CSJ6 and G965USQS7CSJ6 for the S9 and S9+ respectively, and its changelog only includes the new security patch.
No new features included in the update
The November 2019 security patch for Galaxy devices includes a fix for a critical bug in the Android OS that was discovered in September. The Galaxy S9 was one of three Galaxy devices mentioned by name in the list of affected devices, so it's only natural that Samsung would want to release the November update for 2018 Galaxy S flagship in every country as soon as possible. Hopefully, carriers in the US will show similar urgency and soon follow T-Mobile and release the update for their Galaxy S9 and S9+ variants.
To grab the latest update over the air, you have to follow the same drill: Open the Settings app, tap Software update, then select the Download and install option. As always, an alternative method for updating to the latest software is to download the relevant firmware from our firmware database and use a Windows PC to install it on your S9 or S9+.