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Because the bands of 2,4 GHz also differ per country (see the list here https://en.wikipedia.org/wiki/List_of_WLAN_channels) it is true 1-11 are accepted everywhere, but 12, 13 are valid in Europe and Japan but not in the USA and 14 is only valid in Japan. So to connect to a wifi network operating on (in USA illegal) channel 12 or 13 the country code should ...


Try to add in /etc/dhcpcd denyinterfaces wlan0

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