MT7922/RZ616 Windows Hotspot Channel Settings

mt7922-rz616-hotspot-settings.md

Windows Hotspot allows you to easily create an AP (Access Point) from your existing Wifi card. Many computers such as the ROG Ally have a variant of the MT7922 chipset which supports Wifi 6E and it can be used to create a high bandwidth P2P connection for game and VR streaming. Unfortunately, Windows does not provide much support for configuration of the AP channel and bandwidth. Fortunately, it is possible to change these from some registry entries. Note that you must reboot for the changes to take place.

The location of the registry key is inside HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class{4d36e972-e325-11ce-bfc1-08002be10318} and depends on the order the network devices are installed on your computer. For example, it is HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class{4d36e972-e325-11ce-bfc1-08002be10318}\0001 on the ROG Ally. Look at the data for value DriverDesc to confirm that you are in the right key.

WfdGOOperatingChannel

Sets the preferred channel number. Currently unknown if it is possible to specify a 6GHz channel.

Data	Description
0	(Default) Select the best channel.
1-173	Select a specific channel number.

P2P_GO_Band

Specify the channel bandwidth.

Data	Description
0	20MHz
1	40MHz
2	(Default) 80MHz
3	(Unknown) shows as 80MHz

WfdPhyMode

Physical mode for GO connections.

Data	Description
1	(Default) 802.11ac
2	802.11ax

Appendix: Turning on Windows Hotspot without an internet connection

If you want to use the AP feature without an internet connection, it is possible through these instructions.

If the driver refuses to start softAP at 6GHz, you need to create a new regulatory domain code string "CountryName" in the WiFi driver registry.
I set it as KR because this is the country with the most WiFi channels and approved 6GHz for softAP.

Thank you for the response! Setting "CountryName" to "KR" indeed works. I am in US and it didn't work with "US" as "CountryName", despite 6Ghz approved in the region.

6GHz SoftAP is 160MHz, I confirmed this with NCM865 and MT7927

@Andarwinux How did you get NCM865 to work on 6GHz? I tried to follow the guide on reddit with insider build 26120.3291 but got 6ghz band is not available when I try to turn on the hotspot.

If the UI doesn't allow you to select 6GHz, you need to change the system region to a 6GHz softAP approved region. If the driver refuses to start softAP at 6GHz, you need to create a new regulatory domain code string "CountryName" in the WiFi driver registry. I set it as KR because this is the country with the most WiFi channels and approved 6GHz for softAP.

By the way, NCM865 creates 80MHz WiFi 7 hotspot by default, but it became 160MHz/80MHz WiFi 6 hotspot after I unlocked 6GHz hotspot, and I currently can’t find a way to restore it except completely reinstalling Windows.

Hello, could you please explain in detail how to enable the 6GHz hotspot? After changing my country region to South Korea, I still cannot see the 6GHz option in the hotspot settings.