UPDATE: Android 4.4 KitKat OS coming soon...
Android OS version 4.3 Jelly Bean has been leaked for Samsung Galaxy S4, But Google has not been launch yet officially. The Leaked Jelly Bean OS has leaked to SamMobile, where it described as "fully functional" without "a single thing that isn't working".
According to SamMobile – which had earlier shared screenshots of Android 4.3 running on the Google Edition – the ROM is completely unchanged from how their source supplied it, requiring no modifications to work on the more commonly available variant.
Android 4.3 build number is "JWR66N" - Sammobile
Changes we've seen on Android 4.3 is camera UI which is slitly changed to a half rounded circle menu, But there aren't big feature additions - not even on notification bar that we saw in previous version of Android OS.
To Install and Download Click → Android 4.3
To Install and Download Click → Android 4.3
