@tpgediminui What is the speed of your Internet connection, provided by your ISP? That info should help to figure what Deco models can work for you. Also, in your house, are floors made of wood or...

@tpgediminui Deco X50 is not tri-band. For Internet speeds under 500Mbps Deco X50s make little difference comparing with what you had before. I would recommend returning set of X50s for a refund....

@Turmanser This should work, but adding P9 which is older model may disable features present in Deco mesh consisting of X55s only. For example, "connection preference" feature will be unavailable if...

@Kossie Thanks, that tells me everything I need to know. As you may see from these screenshots, most of your Satellite Deco are properly positioned. I would only suggest moving 2sal Deco closer to...

@Kossie With what you have replacing just Main Deco M9 Plus with more powerful unit will not meaningfully improve speed and coverage for your Deco mesh. If you are interested in upgrade, there are...

@Kossie What is the speed of your Internet connection?