How can I fix the hotspot channel? Thank you for your reply~~

[caron0k]

Every time I set channel 36, it works fine at that moment.

But after I restart my phone and turn on the hotspot again, it changes to channel 149, and I have to set it again. It gets reset every boot.

How can I make it stick? My phone is a rooted Android 13 device.

THX

[Mygod]

On Android 13, fixed Soft AP channels may be intentionally stripped before Android saves the hotspot config. VPNHotspot can apply channel 36 to the currently running hotspot, so it works immediately, but Android’s Wi-Fi config store may persist only the band/auto-channel setting. After reboot, hotspot starts from that saved auto config and ACS may choose channel 149.

On AOSP Android 13 this is controlled by com.android.wifi.resources:bool/config_wifiSoftapResetChannelConfig, which defaults to true. When true, Android resets any nonzero channel before storing the config.

There is no VPNHotspot setting that can make this stick if your ROM has that policy enabled. Your options are:

• use channel 0 / auto, optionally limited to 5 GHz;
• patch/override the ROM Wi-Fi resource config_wifiSoftapResetChannelConfig=false, then save the hotspot config again;
• reapply channel 36 after each boot/start.

Root lets VPNHotspot call the privileged API, but it does not bypass this Wi-Fi framework persistence rule.

[caron0k]

Thank you for your reply! Modifying the ROM would be very difficult for me. I'll try changing the country code to Japan, which should default to low-frequency channels.

su
cmd wifi force-country-code enabled JP

[caron0k]

well done! not use the code, just install the KernelSU-WiFi-Country-Code Module😄