T-Mobile is updating three Samsung devices that it offers to consumers all at the same time, with the Galaxy S4, Galaxy Avant, and the Galaxy Tab 4 8.0 LTE starting to receive minor updates over the air. The Galaxy S4 and Galaxy Avant updates carry a single, common feature: support for the Chinese language, and are carrying build numbers M919UVUFNK2 and G386TUVU1ANK3. The Galaxy Tab 4 8.0 LTE, meanwhile, is getting an update with software stability improvements; that's kind of minor as well, though better stability in the everyday user experience are always welcome.
If you have any of the three devices listed above, expect to see a notification for the update in your status bar over the next few days. More info on each update can be found at the source links, and you can drop us a comment if you notice anything new or different after installing the updates on your devices.