when trying to get imei number null exception occurs. when running in windows phone emulator.
//Please check this
object uniqueId;
var hexString = string.Empty;
if (DeviceExtendedProperties.TryGetValue("DeviceUniqueId", out uniqueId))
hexString = BitConverter.ToString((byte[])uniqueId).Replace("-", string.Empty);
MessageBox.Show("myDeviceID:" + hexString);