How can I get increased Mbps from the AC 1200 router to WiFi TVs streaming IPTV. Currently 26-28 Mbps go into the router from the Modem but only 6-7 Mbps come out to my wireless devices. All devices are wireless w/ one Ethernet cable running from the modem to the router. Will upgrading the router to AC 1900 push more Mbps to wireless devices?