Search of this forum for third radio will yield some information. Pay attention to the mwlwifi readme because Radio2 /sdio can currently cause you some grief. Channels / power are dictated by the rango eprom itself.
Are you talking about channel width? Because the last I checked (granted a few versions ago) Android doesn't support reporting the channel width, so is not useful for identifying your WiFi channel width.
It does however support using wider channels, so actual performance should benefit. Although I'm yet to find any use for that kind of bandwidth on my phone.
I'm not sure if that is what you mean though as channel width applies to each radio. I'm not aware of any phone that can connect to more than one radio at the same time, as you would need dual radios in the phone.
Thanks for your help. Did some more research, but ultimately felt that I won't have time to properly fix it until next month at the earliest.
I've had this functionality in my last 2 routers, and hadn't given it much thought before. For now I'll revert back to dd-wrt, and try to work around its issues instead. Having half/third of the wifi speed isn't an option.
Found this, but don't know how relevant it is. Keeping it here as a future starting point: