@ChrisYo94 You are supposed to see WiFi analyzer app WiFiman report WiFi interference/congestion on the channel occupied by Deco mesh, because all Deco units broadcast on that channel. They do it in...

@Ed_Harte If you haven't done anything with ISP Router you had before Deco and Main Deco is connected to it, I would suggest to configure Deco mesh to run in Access Point mode: Switching a Deco to...

@Dee_Evans To add to what was said by @Wrayman This feature is called "Allow List" and is documented here: How to configure Wi-Fi Access Control on your Deco This feature is not available for Deco...

@AlbertH999 I would recommend leaving Deco mesh in AP mode. Way less settings to configure and maximum WiFi performance it can deliver at your place. Just note, there is a bug it Test Internet Speed...

@MartinMartin I am going to give up on this, sorry. Perhaps, someone will have suggestions to share. To summarize, this is what you have: symmetrical Internet link and asymmetrical speed test results...

@Sangello If they are shown as connected by Ethernet, everything is fine. This is known issue. At least, I know it for all three years I own Deco mesh. Once, I was running full PC image backup to...