@Rancey Unfortunately, you can't combine TP-Link powerline WiFi network with Deco mesh WiFi network. Deco will always run its own WiFi network, even in Access Point mode, even if you have same SSID...

@J.Oc Deco E4 has 100Mbps Ethernet ports, this will be the maximum Internet speed it delivers. Main Deco E4 connection to fibre router is where speed is limited by 100Mbps. For your Internet speed of...

@Rancey Can you share model name of TP-Link powerline adapters you are using? I am trying to figure if they are they just powerline, or powerline+WiFi.

@fab1anch0 Sorry, I thought "both decos are connected with Ethernet cable" meant "both decos are connected to each other with Ethernet cable". What you have is much easier to test, and may not need...

@fab1anch0 This is not an expected outcome. In your network setup, you should be getting 300/300 on both Deco M5. Usually, in cases like that, the culprit is wired part of home network: cables,...

@maggieh You do not need to change router network name. Deco and router run separate independent WiFi networks. They can have different names. If you know how to turn off router WiFi, you can do...