So, I've been Googling and YouTubing this for a couple of hours now, to no avail. I've seen ways of downgrading Nexus phones, and even a video on downgrading a Galaxy S5 from 6.0.1 to 5.x using Odin. I tried exactly this process using a .tar for Kitkat, but quickly got the red FAIL! icon in Odin. So, is there a way to do it? Do I need to downgrade to 5.x first? Thanks!!