I recently installed Windows Phone 8.1 emulators to try some existing applications, and ran into this problem: DeviceNetworkInformation.IsCellularDataEnabled(in the namespace Microsoft.Phone.Net.NetworkInformation) always returns false.
public void UpdateDataEnabled()
{
_dataEnabled = DeviceNetworkInformation.IsCellularDataEnabled
|| DeviceNetworkInformation.IsWiFiEnabled;
}

I know that the connection really works, because I can still make HTTP requests. If I run the exact same code in 8.0.x emulators, I have no problem.
I also tried updating the project and all libraries to Windows Phone Silverlight 8.1 applications to make sure that this solves the problem and is not lucky. I checked all the features and ID_CAP_NETWORKING was also checked.
, Windows Phone 8.1 XAML, Windows 8. Silverlight.
, Windows Phone Silverlight Windows Phone 8.1. - ?