@DazCuz I googled your modem name and got this picture: Is this your modem? If it is, keep it running in its default modem/router configuration and instead reconfigure Deco mesh to run in Access...

@JanHooijen I would recommend not to mix X20 and M4 in one Deco mesh. Your better options are: additional M4, S4 or M5. TP-Link does sell single M5 units, and also they may be cheaper than X20. I...

@Patrick050289 Now that your wired speed is very close to what WiFi5 wireless can realistically deliver, your Deco mesh may be hitting its hardware limitations or Satellite Decos need better...

@DazCuz >I have tried both methods in the manual to connect but I do not have a stable connections. What are these methods, can you explain? It is not clear from your post what do you mean. Also, to...

@JanHooijen To give you a good answer, I'll need to ask you for more information: 1. What is Internet speed at your place (ISP provided Internet package)? 2. Do you plan to buy just one Deco X20, or...

@Kaneco Looks OK. Still, please change Lease Time to 60 and if that does not help - to 30. No need to go below 30. If devices still can't acquire IP addresses reliably after that, I'll share other...