Geohot released a rooting method for most android phones, and it uses an apk to obtain root (dead simple too, push one button, no need for other tools and workarounds). It does not touch KNOX or the BOOT-LOADER so your warranty should be fine.
You can get it from the official website, or from the XDA thread.
I ran it on my n9005 - Europe - unlocked phone.
I am on official 4.4.2 N9005OXXENB1
Kernel 3.4.0-636608 (12.02.2014)
Steps taken by me (21.06.2014):
1. Download the tr.apk
2. Turn off re-lock and app security.
3. Run the tr.apk, hit make it rain.
4. Install SU from Playstore, update it, reboot phone.
5. Check root
Question? l am able to recieve official update anymore even via kies or ota?
Στάλθηκε από το SM-N9005 μου χρησιμοποιώντας Tapatalk