Quite rare to see S4 newly bought (July 2014) came out with 4.2.2 firmware. Might be old stock. Youre totally got the facts wrong, the best firmware in terms of stability and battery life (For S4) is 4.3 Jelly bean. Kitkat 4.4.2 is the culprit, battery life is not that good but stable.

If the phone still shows Samsung Bootscreen means its totally can be saved without sending to warranty. Reboot into recovery mode, Wipe data, if problem still persists, flash 4.3 firmware through ODIN

His phone is still under warranty .

anyone using slimkat 8.4? i tried, but something with the camera apps, even try installing other camera apps also same. When i locked the phone orientation, and i open camera apps, then normally we will take landscape orientation photo, so i rotate the phone, but the camera interface did not rotate, and the photo came out is in potrait orientation instead of landscape. Meaning to say, the auto orientation doesnt work in the camera apps. If previous samsung camera apps, even u lock the auto orient at phone, the camera apps will still rotate.

i forgot actually the firmware version..if current official firmware already 4.4.2, then maybe my wife's S4 firmware is 4.3..i remember that on August or September the phone download update automatically and prompt me to update but i just ignore the update..

She already sent it to warranty..if that phone currently on 4.3, should i update to 4.4.2 or not? what about battery life on 4.4.2 compare to 4.3?

Flashing official firmware with ODIN does not trigger knox.
Looks like its the rom problem, go for Nameless rom, the best
4.3 battery life is better than 4.4.2.

oh okies can share link?     i am on i9500 btw.

the moment android L s4 GE rom is available, I'll switch to it.

Can fit without customizing it?

got guide, quite simple, just like normal custom rom, flash and go.

Make sure post some screen shots here. 

someone installed it also last time, for kitkat.

now just patiently waiting for L.

Its "kambing"  nokia6280

  grats haha...

Seriously Samsung should update the touchwiz UI look together with the 4.4.4 update instead of just bumping the android version number.

I don't see why the S4 is not capable of receiveing the UI overhaul.

4.4.4 only. Not android L. 

Its "kambing"  nokia6280

4.4.4 only. Not android L. 

Step by Step la...

he kancheong for that Android L mah hahaha