Hi,

On my new Archer C6 EU v2, 5GHz wifi band always drops after 2 minutes.

I tried several official firmwares 1.3.5 1.3.6 and also latest beta 20201030 60104 seen in the pinned post.

I tried:

* smart connect on and off

* same and different ssid for 2.4 and 5ghz band

* disable and enable qos

* enable and disable openmesh

* setting 5ghz channel width to 80 and channel to 40, auto modes not solve the problem

When router starts, 5ghz band is visible and my phone can connect. After 2 to 4 minutes, revert to 2.4ghz because 5ghz ssid disappears. Speedtests gives me 300/300 on 5ghz and 60/60 on 2.4ghz, confirming the 5ghz band is really off.

Only solution is reboot the router, but fives me 5ghz band only for two minutes.

When smart connect is enabled, all devices go from 5ghz to 2.4ghz very quick.

Around 15 wireless devices in the house. 

2.4ghz band is reliable... but slower...

Any idea to get a stable 5ghz band? Except returning the router to amazon?

Thanks