@HJO Using UTP cable is called Ethernet backhaul in TP-Link Deco terminology. I use that for my Deco M5s and it works just fine. See this FAQ: General questions about Ethernet Backhaul feature on...

@richiee Main Deco must be connected by Ethernet cable. You can't have Main Deco wirelessly connected to the router.

@Jeff1976 The official TP-Link answer will be "any other Deco model is compatible," but in your specific case with WiFi5 Deco mesh I would recommend to consider the following: Deco M5 Deco M4R Deco...

@LeonardHeul I had conversation on this forum on similar issue, and with M9 Plus. One of Satellite Deco would connect wirelessly to Main Deco, when in fact it has Ethernet connection to switch....

@ecosse206 Virgin Media Hub is cable Internet (coax), right? I have cable Internet and had similar issue with my Deco mesh. In my case, after substantial troubleshooting and adamant ISP denial of any...

@Zulu123 With Deco mesh consisting of M5s, you should be able to configure which band your smart devices will connect to on dual-band Main Network. You can even configure which Deco unit that smart...