@Lee_G This is what I needed to see, thanks. You have WiFi6 capable X20s with up to date firmware. They should be able to deliver faster speeds than you see. Please run the following test when you...

@tanveer2137 The next test I'd like you to do is the following: Keep 3rd Satellite Deco disconnected from Ethernet cable. Power it off. Power off 2nd Satellite Deco. Take Main Deco and bring it to...

@CharlesM99 Thanks for update. Yes, with XE75 6GHz band runs on a separate SSID. I am not sure what caused TP-Link to go with that, perhaps they couldn't manage to implement band steering from...

@tanveer2137 Thanks for clarification. You saying "main deco on Router mode" made me confused a bit. Help me help you by running tests the way I ask. Bring 3rd Deco to where it usually is, do not...

@tanveer2137 tanveer2137 wrote Internet Modem >> Router (Archer AX 10) >> Wired connected to all 3 Decos from the LAN Ports on the AX10 Router Operating Mode: Access Mode @Alexandre. when I unplug...

@tanveer2137 Consistent 85-90Mbps from 3rd Deco hints strongly at that M4 negotiating 100Mbps speed over Ethernet cable instead of gigabit. If that is what happening, you should replace Ethernet...