objective-c carrier

carrier.mm

#import <CoreTelephony/CTTelephonyNetworkInfo.h>
#import <CoreTelephony/CTCarrier.h>

...
  
if (@available(iOS 12.0, *)) {
  NSDictionary<NSString *, CTCarrier *> *dicCarrier =  [[CTTelephonyNetworkInfo new] serviceSubscriberCellularProviders];
  for (id key in dicCarrier) {
      NSLog(@"key: %@, carrierName: %@", key, [[dicCarrier objectForKey:key] carrierName]);
  }
}

CTCarrier *carrier = [[CTTelephonyNetworkInfo new] subscriberCellularProvider];

NSString *carrierName = [carrier carrierName];
NSLog(@"Carrier name: %@", carrierName);

NSString *isoCountryCode = [carrier isoCountryCode];
NSLog(@"ISO Country Code: %@", isoCountryCode);

NSString *mcc = [carrier mobileCountryCode];
NSLog(@"Mobile Country Code (MCC): %@", mcc);

NSString *mnc = [carrier mobileNetworkCode];
NSLog(@"Mobile Network Code (MNC): %@", mnc);