Samsung has started pushing out a new update to the Galaxy Tab S3. Arriving as build number T825XXU1AQD6 and currently only hitting the LTE variant of the tablet, the update brings Android security fixes for April.
Aside from the latest security patch, the update also includes some system improvements as well as regular bug fixes.
As is usually the case with OTA roll outs, it may take some time for the update notification to pop up on your device. You can manually check for the update by heading to your handset's Settings menu.
256 expandable on S3