I want to get the Device ID in Windows Phone 8.1.
The DeviceExtendedProperties or DeviceStatus are not available in WP8.1 (there is no Microsoft.Phone.Info namespace). I've just found the EasClientDeviceInformation class that I can't get the Id from it. There is an exception in the Id property:

And other properties are't unique.
There is another solution here but I don't know if it is safe or reliable to use: (?)
https://stackoverflow.com/a/23537207/3682369