[get Mobile Carrier name in iOS]

getCarrier.swift

+ (NSString *) getCarrierName
{
    CTTelephonyNetworkInfo *netinfo = [[CTTelephonyNetworkInfo alloc] init];
    CTCarrier *carrier = [netinfo subscriberCellularProvider];
    NSString *carrierName = [carrier carrierName];

    if (carrierName == nil) {
        return @"unknown";
    }

    return carrierName;
}