I wouldn't use the method posted above unless you verify it is or 4.4.2 which I don't believe it is. There currently is not a root option if you are using kit Kat. Lots of people are waiting for root. When it happens you will surely see a method posted. The methid in the link above is more than likely root for a jelly bean version and may screw up your phone.
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He is correct the method above will not work. I believe actually it only worked on mi9. If you do this at best it will simply fail at worst you will brick... In all likely hood you would wind up at a best buy getting reflashed.
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