@Chris68 OK, this can do. You have latest firmware, which means issues must be somewhere else. Now to clarify how everything is connected at your place. 1. Main Deco, is it connected to the fiber box...

@Quintusson You will not need to buy new router. The plan I have for you is same I had for myself: start with what already there, make minimal changes to existent network - and if Deco mesh is not up...

@Chris68 I run Deco mesh with M9 Plus in AP mode, and can confirm it runs the way you expect it to run. What you have is not expected. I can't explain why your Deco mesh behaves that way, but may be...

@Quintusson One more thing. In some regions TP-Link started to offer Deco X10, which is even more budget-friendly than X20 and also supports WiFi6. Check if they sell X10 in your region and if you...

Mirged wrote So, I moved in a new apartment and found a deco box with manuals, one satellite Deco device, Ethernet cable and power cable. Apparently the previous resident of the apartment moved...

@Quintusson I think you will be able to deploy Deco mesh by yourself (with my remote assistance), no need to spend money on someone's else help, at least until you try. Your list of Deco models you...