I have a funny shaped apartment with lots of doors and passage ways. It isn't huge and isn't small. I have tried repeaters and the signal is still crappy. I have a Fibre router on one side of the apartment and a Smart TV in a living room and an Android box in a bedroom about 40 metres away, but the wifi is still crappy. I had an older TV before that I plugged my Android box in and the box had an aerial. It worked in the old TV to watch Prime Video and Netflix, but now I have a newer TV and the aerial is suppsed to be in the TV and the wifi isnt as good. Is there a Wifi aerial I can plug into the Smart TV via USB for a start? If not what is the best way to get perfect Wifi in a problematic living space? Its funny, if it was a 2 floor house I could understand it. I have a normal repeater plus a repeater that I can plug into the router via cable. Both have antenas. The first one is a NETGEAR RANGE EXTENDER N300 (EX2700) and the newer one is a Aigital WiFi Router, 300Mbps Wireless Repeater Booster Wireless-N 2.4GHz Universal (WPS).
Or is there a better way, like a second wifi router, that will connect to my existing Orange Fibre Livebox?
I want to recommend you to use same band router and extender, i means if you are using 2.5GHs band extender then use same band router.
Don't place your netgear extender in the corners. If possible then keep it near to router.