Import Statement :
#import<CoreTelephony/CTCarrier.h>
#import <CoreTelephony/CTTelephonyNetworkInfo.h>
you can get country code for the current Carrier using CoreTelephony framework:
CTTelephonyNetworkInfo *network_Info = [CTTelephonyNetworkInfo new];
CTCarrier *carrier = network_Info.subscriberCellularProvider;
NSLog(@"country code is: %@", carrier.mobileCountryCode);
//will return the actual country code
NSLog(@"ISO country code is: %@", carrier.isoCountryCode);