....... The i9505 does not have a locked bootloader. 100% unlocked. It can be rooted with cf-root on any rom or bootloader version including kitkat since ages ago. It does not require loki, it has no lock anywhere, 0, zero, cero, zilch. It only has a knox flag, that will be triggered when a custom recovery, kernel or rom is installed and the only thing it will do is void your warranty. But you can still install whatever you want on any bootloader version. You don't need to unlock or bypass anything. That said, flashing cf-root will trigger this flag, but, you can still flash it if you want.
I think we need a sticky on the S4 section mentioning the only ones with a locked bootloader are the at&t and verizon variants. The only ones requiring loki are at&t and verizon.
What applies to at&t does not apply to the rest of them.
loki dont work past 4.3 and kit kat so im safe strapped (wasnt even going to get into that) ok man I reccomend cwm after you root the rest still does apply about the backup make sure you save it to the extsd so you wont accidently delete it and be romless and loose everything use a program called titanium backup to backup all of your apps and call log and sms restore for the rest you might want to get a 32 or 64 gig sd card it makes it a lot easier 
store your rom you want to flash on your extsd and after your full wipe select it from the list flash it and boom also always check your md5 sums
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