Using own Router, which modem should I get?

[finnbrks]

I bought a third party router the other week to use the qos features to improve my gaming experience. I knew I needed to buy a modem so I got an second hand BT Openreach modem plugged it all in and I got a WIFI signal but  I couldn't get a internet  connection. Plugging a ethernet port from my pc to the second slot on the modem I still didn't get a connection. 

I would like to know what modem I should buy that works with BT. 

(I bought a NetDuma router, I have Normal BT fibre at 70mbps down, 20 up)

The main problem in trying to solve is gaming while people are streaming. Games such as FIFA require a constantly low ping however when someone is streaming every 5-10 seconds it goes to 100+ ping for 2-3 seconds.

[licquorice]

If you have fibre2 rather than G.Fast, the Openreach modem should have been fine. It should be plug and play, perhaps it was faulty. 

[imjolly]

when you connected your 3rd party router did you enter the username and password

bthomehub@btbroadband.com

password if needed - anything many just use BT

[finnbrks]

Do you have this one?

[finnbrks]

Yes I did that.