How to get Mobile Country and Network code on an iPhone

You need the CoreTelephony framework

CTTelephonyNetworkInfo *networkInfo = [[CTTelephonyNetworkInfo alloc] init];
CTCarrier *carrier = [networkInfo subscriberCellularProvider];

to get MNC,

NSString *mnc = [carrier mobileNetworkCode];

to get MCC,

NSString *mcc = [carrier mobileCountryCode];