The Galaxy Note 9 was launched back in 2018 with Android 8.1 OS. Later, the device received two major OS upgrades in the form of Android 9 and Android 10. And, the device is no longer eligible to receive another OS update, Android 11. But, the Samsung Galaxy Note 9 will continue to receive security updates for 4 years from the date of launch. The latest security update for Galaxy Note 9 comes with firmware version N960USQS7FUA1. This is a minor update and does not add any new features to the device. Galaxy Note 9 users can check for the latest build by navigating to Settings -> Software update and then tap on Download and install.