（转）区分当前用户SIM卡是联通还是移动

背景知识
国际移动用户识别码（IMSI：International Mobile Subscriber Identification Number）是区别Mobile用户的标志，储存在SIM卡中，可用于区别移动用户的有效信息。IMSI由MCC、MNC、MSIN组成，其中MCC为移动国家号码，由3位数字组成，唯一地识别移动客户所属的国家，我国为460；MNC为网络id，由2位数字组成，用于识别移动客户所归属的移动网络，中国移动为 00，中国联通为01；MSIN为移动客户识别码，采用等长11位数字构成。唯一地识别国内GSM移动通信网中mobile客户。所以要区分是移动还是联通，只需取得SIM卡中的MNC字段即可。

代码实现

// TelephonyAO.h
#include <e32base.h>
#include <Etel3rdParty.h>
 
class CTelephonyAO : public CActive
{
public:
 static CTelephonyAO* NewL();
 void GetNetWorkId(TDes& aNetworkId);
 
public:
 ~CTelephonyAO();
 
protected:
 void DoCancel();
 void RunL();
 
private:
 CTelephonyAO();
 void ConstructL();
 
 void GetNetWorkInfo();
 
private:
 CTelephony* pTelephony_;
 
 CTelephony::TCancellationRequest cancelRequest_;
 CTelephony::TNetworkInfoV1 networkInfo_;
 CTelephony::TNetworkInfoV1Pckg networkInfoPkg_;
};
#endif// TelephonyAO.cpp
#include "TelephonyAO.h"
 
CTelephonyAO::CTelephonyAO() : CActive(EPriorityStandard), networkInfoPkg_(networkInfo_)
{
 CActiveScheduler::Add(this);
}
 
CTelephonyAO::~CTelephonyAO()
{
 delete pTelephony_;
}
 
void CTelephonyAO::ConstructL()
{
 pTelephony_ = CTelephony::NewL();
}
 
CTelephonyAO* CTelephonyAO::NewL()
{
 CTelephonyAO* pSelf = new(ELeave) CTelephonyAO;
 CleanupStack::PushL(pSelf);
 pSelf->ConstructL();
 CleanupStack::Pop();
 return pSelf;
}
 
void CTelephonyAO::RunL()
{
 CActiveScheduler::Stop();
}
 
void CTelephonyAO::DoCancel()
{
 pTelephony_->CancelAsync(cancelRequest_);
}
 
void CTelephonyAO::GetNetWorkInfo()
{
 Cancel();
 cancelRequest_ = CTelephony::EGetCurrentNetworkInfoCancel;
 pTelephony_->GetCurrentNetworkInfo(iStatus, networkInfoPkg_);
 SetActive();
 CActiveScheduler::Start();
}
 
void CTelephonyAO::GetNetWorkId(TDes& aNetworkId)
{
 GetNetWorkInfo();
 aNetworkId = networkInfo_.iNetworkId;
}使用（N70测试通过）：

TBuf<4> networkId;
 
CTelephonyAO* pTelephony = CTelephonyAO::NewL();
CleanupStack::PushL(pTelephony);
pTelephony->GetNetWorkId(networkId);
CleanupStack::PopAndDestroy(pTelephony);
// 下面通过判断networkId是01还是00即可区分移动和联通