@BasK That was going to be my next recommendation: using the switch. Also, question for you: do you have ISP modem or ISP modem/router? Because, if it is router, you could configure Deco mesh to run...

@BasK It is most likely the cable that Deco units don't like for any reason, but perhaps there might be a workaround which could make it work. If you connect one side of that cable to Main Deco, and...

@Liwiu Each WiFi mesh "hop" cuts speed by half. This is not just Deco, it is the limitation of WiFi mesh technology, for any brand. Which means, if your Main Deco delivers 250Mbps, Satellite...

@my2108 I don't know when TP-Link will release new firmware 1.6 with that feature for M9 Plus. Beta firmware was around for a while, and TP-Link Support just promised that release is "around the...

@my2108 In that case, here is another option to try. TP-Link offers beta firmware for Deco M9 Plus: https://community.tp-link.com/en/home/forum/topic/574954 After you install it, the "preferred...

@Tiz One more thing to check. Bring Satellite Deco to where Samsung TV is, connect TV to Satellite Deco with Ethernet cable. If that works, you might have IPTV enabled for the second port of Main...