Just purchased a Netgear Nighthawk X4S and I can not for the life of me figure out how to get it to broadcast the 802.11AC network. All it will do is 802.11n. I've searched via Google and can't find a fix. Does anyone have this router and know how to fix it? It is replacing my Airport Extreme and Airport Express, those were way easier to set up and manage but the X4S is a beast and provides no dead spots in my house... Thanks in advance!