Samsung has started rolling out Android Kitkat version 4.4.3 to its Indian users of Galaxy S4 and Galaxy Note alongwith upgrades to the US users starting June 6th 2014. It may be noted that Samsung had been rolling out the Android 4.4 KitKat to its users for past four months in a phased manner since the the roll out first began. India and US were two countries which were left out of the rollout package initially.
Samsung has also simultaneously GT-i9500 Android 4.4 KitKat update recently landed for users in Chile, Mexico and Columbia. As for the GT-i9505, the LTE model, we haven’t seen any recent updates emerge.
In the U.S, Samsung has finally started rolling out the AT&T Galaxy S4 Active Android 4.4 KitKat finally started redeploying on June 6th, six weeks after Samsung and AT&T halted its roll out. Here is what it has on board.
Android 4.4 OS upgrade (http://www.android.com/versions/kit-kat-4-4/)
Copy and paste improvements
Easier to insert pictures and videos in email or messages
Camera app accessibility from the lock screen
Call reliability improvements
You can also update your Samsung Galaxy S4 by going to settings > more > about device > update. Kindly note that the update is large one at 463MB so it is advisable to use WiFi for the update