Anyone else noticed this. With the old legacy wireless drivers I was able to use 5ghz Band C in the United Kingdom, but with the newer wifi-qcom-ac drivers, Band C is no longer available when set to the United Kingdom.
Printing out the supported WiFi channels in the terminal also confirms that they are unavailable to use.
Under current conditions, there will be no change to the existing settings as these limitations are due to the implementation of the new driver. If you need access to these frequencies, we recommend that you use legacy wireless package.
Basically have to use the old wireless drivers to use this band with AC devices. it’s sitting quite happily at the moment on a nice clear section of band B, so will leave it be.