Verizon pushes out Android 5.1.1 and Stagefright fixes to Galaxy S6, Galaxy S6 edge and Tab 4 10.1
The update to the Samsung Galaxy Tab 4 10.1 adds the Lollipop based Material Design to the tablet, contains the security patch to protect against Stagefright, and includes a reactivation lock. With this feature, someone who finds or steals the tablet won't be to able to pull off a factory reset until the rightful owner signs into his Samsung account first. The update brings a brighter looking theme to the slate, along with the new "Recent Apps" page. Lock Screen notifications are also added as are Floating Action buttons.
Because the update is being disseminated to all three devices OTA, they are sent out on a staggered basis. If you don't receive the update today, perhaps it will come tomorrow, or the next day. Be patient and before you know it, you will receive the notification alerting you that the update is here. When it does come, you should be on a Wi-Fi connection before beginning the updating process, and make sure your battery is charged to at least 50% before downloading and installing the update.
source: Verizon (1), (2), (3) via AndroidCentral