@Momcho The purpose of this document and TP-Link reply is to make sure the most powerful Deco unit is the Main Deco, because and especially in the Router mode that unit performs all heavy lifting:...

Momcho wrote Here are the speed tests when connected to different Decos: M9Plus #1 Master - 300Mbps DOWN, 260Mbps UP M9Plus #2 - 265Mbps DOWN, 208Mbps UP (it is connected with a cable, why????) M4R...

@Lukecold__ It is possible that these devices can't handle WiFi dual band under single SSID, especially Sony TV is a suspect. For troubleshooting purposes, split 5GHz and 2.4GHz to two bands with...

@SirFarnsworthII You won't get wireless speeds much faster than 550Mbps from Deco M5. In fact, yours is doing better than mine: top wireless speed I ever got from Deco M5 is 475Mbps. I am impressed...

@ErnieBernie Just like that:

@Gregor50 I would recommend you read document that I provided. It explains how to properly wire Deco units. Short document summary: if you run Deco in Access Point mode, you could wire Deco units any...