bro just check the software update again
and be sure u are not on custom recovery or rooted
and the update is only available on OTA and not on KIES
I checked on OTA right now, it says that the latest updates have already been installed
I am getting the update via kies but it will take a lot of timen i want OTA update
as i checked on sammobile
it shows only ota update is released in India and there is no kies update available yet
while i was flashing cm11 today it showed me the 4.3 update
but i denied that and rooted the phone and flashed cm11
just upgraded and very fluid till now
Sent from my GT-I9300 using xda app-developers app