@Ramblin_Rosa1 You can check what bands Deco M5 broadcasts in Deco app, under Wi-Fi Settings. If you suspect the issue is because Roku smart TV needs to connect to 2.4GHz specifically, to test that...

@WouterP It is normal for WiFi speed to drop significantly with WiFi backhaul, especially if there is signal obstacle such as concrete floor between WiFi mesh units. WiFi mesh units communicate with...

@ram.sh If you haven't started yet, I have recommendation on deployment. By default, Deco mesh is configured in Router mode. For your setup to work, it must be in Access Point mode. After you...

@Chris69 Check Deco app WiFi configuration settings: you must have enabled both 2.4GHz and 5GHz on your Main Network. To force Android smartphone use 5GHz only, disable 2.4GHz on Main Network. If you...

@melioodafu There is Test Internet Speed button in Deco app for Deco M5, under More/Router Settings, which runs speedtest from inside Main Deco to the Internet. Try it. If it completes successfully,...

@ram.sh Yes, this setup will work just fine, as long as networking switch is compatible. You can read more about it here: General questions about Ethernet Backhaul feature on your Deco