Discover whether the network device radio is turned on

If the user starts the mobile broadband app directly from its tile, the mobile broadband device might be turned off. This will usually happen if the device entered a power-saving mode or the end user turned on airplane mode (which disables the network devices). If this is the case, getting the CurrentRadioState property of the MobileBroadbandDeviceInformation object for the network device in question will return MobileBroadbandRadioState.Off. (Alternatively, if the radio is turned on, the CurrentRadioState property will return MobileBroadbandRadioState.On.)

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Common tasks for mobile broadband Windows Runtime APIs