I faced the same issue when I bought a new TV in my new apartment and I tried to connect it to the Wi-Fi. It was very slow and impossible to use. And that's why I can't test all the features that I wanted to use in my new wide TV. So I started to look up for the problem and a friend of mine told me that this could come from my Internet provider, because the speed was too slow. To be honest, even my PC was running on slow speed internet, so this idea was a great one, so I started to search for a new provider or for a better coverage plan, and it took me too much time. My friend told me that it could be much easier if I will use usave.co.uk service for that as they will find everything I look for. So I used this service, and they found a huge amount of offers for a really affordable price. To cut it short, it wasn't the provider issue and I solved my TV's problem using some advices from this forum, with all that, now I have a great Internet speed, and I am pretty happy with that. https://usave.co.uk/broadband/contention-ratio/