I need QOS to prioritise Teams calls as my nest cameras keep hogging the bandwidth. Should I replace the BT router with a vdsl router or use smart hub as router only and buy a WiFi router to get QOS and daisy chain? Which routers are best for QOS? I would also like good WiFi coverage as have 3 storey town house.
If you have VDSL but not a G.Fast connection, then TP Link have a range of VDSL routers which have bandwidth controls. Prices start at about £35
https://www.tp-link.com/uk/home-networking/dsl-modem-router/td-w9970/#specifications
Emulator https://emulator.tp-link.com/w9970-v3/index.htm
I use this one myself, to allow background upload to OneDrive without interfering with other devices.
I use it with the Tenda Nova MW3 wireless mesh to give coverage inside and out.
There is also a more expensive one
https://www.tp-link.com/uk/home-networking/dsl-modem-router/archer-vr900/#specifications
Emulator https://emulator.tp-link.com/Emulator_VR900(EU)2.0/index.htm