Unroot S5?

[Jonah Sun]

I need help ASAP. I'm on NK7 4.4.4. Can someone send me the stock rom for 4.4.4 NK7? Also, what backup method should I use? How to flash stock rom? I'm on verizon. Please help ASAP... I'm a noob...

 

[Rukbat]

SamMobile Firmwares has it. Unzip the files and use Odin to flash them.