@hchieu 

Hi, welcome to the community.

Did you use any 6GHz router before?

I noticed you are located in Vietnam. It doesn't seem to be 6GHz available.

https://www.wi-fi.org/countries-enabling-wi-fi-in-6-ghz-wi-fi-6e

Could you share any local 6GHz wireless regulations or related articles with me?

Thank you very much and best regards.

  @hchieu 

Hi, Thanks for the quick reply.

The use of 6GHz needs the support of local wireless regulation, mobile devices and wireless routers.

You could see from here that Japan has adopted 6GHz. So the local purchased smartphones and routers have also enabled 6GHz Wi-Fi.

https://www.wi-fi.org/countries-enabling-wi-fi-in-6-ghz-wi-fi-6e

I think the Deco BE85 itself is capable of 6GHz but 6GHz hasn't been authorized in Vietnam yet. The local purchased mobile phones under VN region code will not support 6GHz either.

Thank you very much and best regards.

  @hchieu 

Hi, yes, It should be.

But I think I still need to mention once again. Both the router and mobile phones need to support 6Ghz

If the mobile device whose country code is locked to certain region that does not support 6GHz, It couldn't detect the 6Ghz of Deco BE85 either.

Best regards.