@Markup Your setup worked with Nexxt router, because you must have configured it as Wireless Repeater for your ISP Router. You can't do that with Deco mesh. What you have now is two independent...

@WouterP When you changed ISP, something else must have happened in your house that is coincided with it. Moving to different ISP can only impact link between Main Deco and ISP modem/router. Because...

@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...