Originally Posted by wangweixun
nvm. Got it. It'll turn my device back to stock image.
If that works, there is a way I can flash a pure 4.4.2 KitKat on my phone? Or "I337UCUFNB1 100% Stock Rooted ROM" is my best bet?
You can't flash any AOSP roms with safestrap, only Touchwiz based ones. Your bootloader is locked so it's impossible for you to flash any vanilla android or google edition roms.
The "I337UCUFNB1 100% Stock Rooted ROM" is basically stock GS4 Touchwiz firmware that is rooted.