It's worth adding that on my cellphone the 5.8ghz wifi connection appears but not on my laptop.

Thanks for your reply. Sorry but I don't have too much knowledge on linux or configuration stuff, how can I do that? there's a guide where I can find it? Thanks in advance.

Hi everyone, I installed my archer t2u on ubuntu 20.04.4 and it's working fine on 2.4 ghz wifi connection but the 5.8 ghz connection of my wifi modem do not appear anymore. It appeared initially for...