GL-INET MT1300 use wifi as WWAN@5GHz

Thanks to this post, now I am able to use my GL-INET MT1300 with WiFi (both 2.4GHz/5GHz) properly (at least reboot won't brick now).

The other problem is using wireless as WWAN, yes sometimes in a hotel I wanted to use my router to join existing WiFi network and provide access to my own clients. As wlan0 is 2.4GHz & wlan1 is 5GHz, I wanted to join 5GHz but the scanning with Luci will not start, it works on the 2.4GHz one though.

I found a way to make it working on 5GHz is, edit config manually to change /etc/config/wireless file and replace 'radio0' to 'radio1' if you want to use 5GHz as WWAN.