AT-AX88U can't connect AX device?

[thanh]

I try to connect my Samsung galaxy s22 ultra to router RT-AX88U but wireless log show AC not AX can you look what i set up wrong?
thank you

 

[L&LD]

Put the Wireless mode to Auto. You may need to reboot and/or 'forget' the connection on the S22 Ultra too.

 

[thanh]

Put the Wireless mode to Auto. You may need to reboot and/or 'forget' the connection on the S22 Ultra too.

I just turn wireless mode to auto ,reboot wait 15 minus check back but still AC mode? What you mean about "the connection on the S22?"something need turn on in S22?