@Singh007 Another test that you could run is to turn off all Satellite Deco, leave just Main Deco, and run speed tests with devices now for surely connected to Main Deco. What you will get in this...

@Singh007 Turn off 2.4GHz in Main Network and see if it can improve speed, because then you will be disabling band steering and forcing your mobile devices always use faster 5GHz. If you see no...

@tpliiiink Usually you can have Deco in Access Point mode assigning IP addresses when it loses connection to router, Freebox in your case. When connection is restored, Deco will yield to the router...

@tpliiiink Have you added new X20s to existent Deco mesh network, or have you created 2nd Mesh network for them? If you added them to existent network, you should see all of them together in Deco...

@djthirdy1316 Yes, you can turn Satellite Deco off when not in use. You can't configure to turn them off in Deco app, but you can just unplug them or connect through smart plugs which will power on...

@GlennLDN If you have to run WiFi on router, make it with different SSID than Deco WiFi and have everything else connected to Deco WiFi.