So my Bro-in-law just moved into a new 3 story house. Comcast set up a modem/wireless router on the bottom floor. It doesn't reach the top floor. He went to target and the guy sold him the Nighthawk X6 and told him to use it as an extender. He called me up and wants to know how to do it. I have no idea how to do it without looking at it. I'm also not sure if he's be better off just turning off the wifi on the Comcast device and try using X6 as a whole house solution. The problem is the upper floor which is furthest from the router will need the most bandwidth.