I have a BT smart hub in the house and connected via cat 6 cable a Nighthawk D7000v2 in my new annex some 50 meters away. The WiFi keeps dropping in and out in both locations.
when I told BT they supplied a wholehome dual band AC2600 unit which when connected via the Cat6 cable gives OK WiFi but no opportunity to hardwire smart TV's etc. So I would really want the Nighthawk to work. I am not that technical.