If you have one of three Samsung devices on Sprint, you might just have an over-the-air update waiting for you in your Settings menu. But don't get too excited: not a one of them brings a new version of Android, or even more than one or two new visible features. The Galaxy S III and Galaxy S5 Sport (AKA the S5 Active) phones and the Galaxy Tab 4 (the 7-inch version) all have tiny additions to their software going out today.
The Galaxy S III has been on the market for over two years, so it's the device with the most previous software updates. Today's patch to version L710VPUCNJ2 adds an "HD Voice Icon" for calls with increased sound quality and "Google security patches." The ruggedized Galaxy S5 Sport gets its first update since release, adding "Minor UI enhancements" and nothing else in version G860PVPU1ANK2. The Galaxy Tab 4 also gets its first update to T237PVPU1ANL1, adding Samsung's Kids Mode UI layer.
Sprint didn't post how big these update files are, but I doubt they're very large. Sprint staggers its updates like all US carriers, so don't be surprised if they don't show up on your phone or tablet immediately. As always, any root-level modifications to your Android software or recovery may cause the update to fail.