@Viking1100 If you suspect that the Deco unit on the ground floor does not behave well, you could simply swap it with the other satellite Deco. Sometimes the app does not show correctly where clients...

@LouieGeez Does the device give an error message when attempting to connect?

@Gamingdexter The Ethernet ports of the X60 are 1Gb ports. This will perhaps give better results, depending on your usage: setting the Operation Mode of the Deco to "Access Point", and connecting...

@IntheD When you write "reset it but tapping the button", do you mean doing that in the app? Did you try pressing the physical "reset" button on the "old main" satellite during a few seconds?

@Iceman803 I believe it is better to keep two distinct SSID, because a device will not transparently roam between the 2.4/5 wifi network and the 6ghz wifi network. From the perspective of the...

@Educlaro What do you see in AP mode and connecting the M4R and the S4 in series?