Previously in WP8.0,To determine mobile operator we are using
DeviceNetworkInformation.CellularMobileOperator.
string MobileOperatorName=DeviceNetworkInformation.CellularMobileOperator;
WP8.1:
public void GetMobileOperatorName()
{
var result = NetworkInformation.GetConnectionProfiles();
string CarrierName = "";
foreach (var connectionProfile in result)
{
if (connectionProfile.IsWwanConnectionProfile)
{
foreach (var networkName in connectionProfile.GetNetworkNames())
{
CarrierName = networkName;//Get mobile operator Name
break;
}
}
}
}
Note: You must enabled your data connection.