Neither device will be gaining any new features with these updates, only the September security patch. The September patch, like every security patch, brings fixes for vulnerabilities in both the core Android OS and in Samsung's customized software that runs on Galaxy devices. It fixes four critical vulnerabilities in the former and 17 vulnerabilities of varying severities in the latter, including a vulnerability that could allow attackers to get around a device's screen lock password.
Galaxy Tab S4 and Galaxy A7 (2018) users can download the latest update by going into the device settings, navigating to Software update, and tapping the Download and install option. We have the firmware for these updates in our firmware archive for those who would like to upgrade to the latest software manually. Galaxy Tab S4 firmware can be downloaded here and Galaxy A7 (2018) firmware can be downloaded here.
