OK. This seems to work: https://stackoverflow.com/questions/4804398/detect-airplane-mode-on-ios?noredirect=1&lq=1
boeboe26
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I guess it would help if
NEHotspotConfigurationManager.shared.apply(self.hotspotConfig) {(error) in
was not called when the device is in airplane mode/ WiFi manually turned off. Is there a way to check that?