As of yesterday, T-Mobile is pushing out a new firmware upgrade to the Samsung Galaxy Tab S 10.1, bringing the device to Android 5.0.2 Lollipop.
Keep in mind that updates like these take time to roll out to everyone. The update started rolling out to the device on May 18, but it could take some users as long as June 5 to get it on their tablets.
If you haven’t received a notification just yet, you can check manually by going into your app tray and tapping the Settings icon. From there, tap General > About Device > tap OK > tap Start. From there, Lollipop should begin installing on your device. Once it’s finished, you should have a new baseband version–T807TUVU1BOE1.
Have you gotten the update yet? Let us know in the comments!