It came back to normal now after another reboot. Strage but works :/

@Kevin_Z my phone supports 5G Tried as you said but still nothing

Hello, I use this Arched C6U for a year. It was ok, both 2.4 and 5Ghz was working until few days ago. I did a reset, factory reset, reinstalled latest firmware (Archer C6U(EU)_V1_201230) and still...