Channels above 11 on Asus RT-AC87U: possible?

[technet]

Wifi Analyzer always shows me that 2.4 Ghz channels above 11 would be the recommended ones.

On the interface of the latest Asuswrt-Merlin for RT-AC-87U, 380.67, I can't select channels higher than 11. There are any possible way to use channels higher than this?

Thanks!

 

[RMerlin]

Channels 12 and 13 are only available in a few countries, and in general they ain't used anyway because a lot of clients don't support these channels at all.

 

[Vexira]

you can do it you have to set the contry code via ssh, i set mine to AU so i could get 13 and 12 on the 2.4ghz and 165 on the 5ghz but only on 20mhz with i could get it on 80mhz, but unforutuantly i couldnt get it to stick as in survive a reboot.