iPhone 判断运营商

- (NSString *)getCarrier
{
    NSString *strCarrier = nil;
    CTTelephonyNetworkInfo *networkInfo = [[CTTelephonyNetworkInfo alloc] init];
    CTCarrier *carrier = [networkInfo subscriberCellularProvider];
    if (carrier == nil)
    {
        [networkInfo release];
        return strCarrier;
    }
    
    NSString *code = [carrier mobileNetworkCode];
    if (code == nil)
    {
        [networkInfo release];
        return strCarrier;
    }
    
    // 根据mobileNetworkCode判断运营商
    if ([code isEqualToString:@"00"] || [code isEqualToString:@"02"] || [code isEqualToString:@"07"])
        strCarrier = @"中国移动";
    else if ([code isEqualToString:@"01"] || [code isEqualToString:@"06"])
        strCarrier = @"中国联通";
    else if ([code isEqualToString:@"03"] || [code isEqualToString:@"05"])
        strCarrier = @"中国电信";
    else if ([code isEqualToString:@"20"])
        strCarrier = @"中国铁通";
    else
        strCarrier = nil;
    
    [networkInfo release];
    
    return strCarrier;
}

China - CN

MCC	MNC	Brand	Operator	Status	Bands (MHz)	References and notes
460	00	China Mobile	China Mobile	Operational	GSM 900 / GSM 1800 / TD-SCDMA 1880 / TD-SCDMA 2010
460	01	China Unicom	China Unicom	Operational	GSM 900 / GSM 1800 / UMTS 2100	CDMA network sold to China Telecom, WCDMA commercial trial started in May 2009 and in full commercial operation as of October 2009.
460	02	China Mobile	China Mobile	Operational	GSM 900 / GSM 1800 / TD-SCDMA 1880 / TD-SCDMA 2010
460	03	China Telecom	China Telecom	Operational	CDMA2000 800 / CDMA2000 2100	EV-DO
460	05	China Telecom	China Telecom	Operational
460	06	China Unicom	China Unicom	Operational	GSM 900 / GSM 1800 / UMTS 2100
460	07	China Mobile	China Mobile	Operational	GSM 900 / GSM 1800 / TD-SCDMA 1880 / TD-SCDMA 2010
460	20	China Tietong	China Tietong	Operational	GSM-R

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详细参考：http://en.wikipedia.org/wiki/Mobile_Network_Code