@McFly not sure but still waiting TP link inputs .

@McFly as mentioned, for main WiFi i have kept only 2.4GHZ and Guest only 5 GHZ to isolate the SSID but it seams same. the main DECO connected directly to the router which it works fine previously ....

@McFly same the signal strength very poor and 1 bar only. do you think hardware issue or the M5 has poor signal strength ?

I am contacting the Tp-Link support but no update yet

@TP-Link_Deco @Kevin_Z

I got the devices 2 days ago from Amazon Uk . one of the M5 has been used as main DECO connected with eth cable on the 1st floor . the 2nd device and 3rd device connected over the WIFI from main DECO...