diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
index fd7a6ce9..00f58efe 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
@@ -209,9 +209,9 @@ public class AppMaster {
             postParams.add(new Pair<String, String>("oid", mService.getSerialNo()));
             postParams.add(new Pair<String, String>("maintainVersion", mService.getMasterAppVersion()));
 
-            postParams.add(new Pair<String, String>("simcard1", getImei(1)));
+            postParams.add(new Pair<String, String>("simcard1", mService.getIccid(1)));
             if (mService.isSeparateNetwork()) {
-                postParams.add(new Pair<String, String>("simcard2", getImei(2)));
+                postParams.add(new Pair<String, String>("simcard2", mService.getIccid(2)));
             }
 
             postParams.add(new Pair<String, String>("freeROM", getFreeROM()));
diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index b17a4735..b2ee237d 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -24,6 +24,8 @@ import android.os.Messenger;
 import android.os.PowerManager;
 import android.os.SystemClock;
 import android.telephony.SignalStrength;
+import android.telephony.SubscriptionInfo;
+import android.telephony.SubscriptionManager;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.text.format.DateFormat;
@@ -116,6 +118,9 @@ public class MpMasterService extends Service {
     private PendingIntent mPreviousHB = null;
     private long mPreviousHeartbeatTime = 0;
 
+    private String mIccid1 = null;
+    private String mIccid2 = null;
+
     public MpMasterService() {
     }
     @Override
@@ -129,7 +134,7 @@ public class MpMasterService extends Service {
         super.onCreate();
 
         loadConfig();
-
+        loadIccid();
         logger = Logger.getLogger("com.xypower.mpmaster.logger");
         logger.setLevel(Level.ALL);
         // LogFormatter.installFormatter(logger);
@@ -226,6 +231,14 @@ public class MpMasterService extends Service {
         registerHeartbeatTimer();
     }
 
+    public String getIccid(int number) {
+        if (number == 1) {
+            return mIccid1 == null ? "" : mIccid1;
+        } else {
+            return mIccid2 == null ? "" : mIccid2;
+        }
+    }
+
     @Override
     public void onDestroy() {
 
@@ -273,6 +286,31 @@ public class MpMasterService extends Service {
         mTimeOfMpAppAlive = masterConfig.mpappMonitorTimeout;
     }
 
+    private void loadIccid() {
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP_MR1)
+        {
+            try {
+                SubscriptionManager sm = SubscriptionManager.from(this);
+                List<SubscriptionInfo> sis = sm.getActiveSubscriptionInfoList();
+                if (sis.size() >= 1) {
+                    SubscriptionInfo si1 = sis.get(0);
+                    mIccid1 = si1.getIccId();
+                    // String phoneNum1 = si1.getNumber();
+                }
+                if (sis.size() >= 2) {
+                    SubscriptionInfo si2 = sis.get(1);
+                    mIccid1 = si2.getIccId();
+                    // String phoneNum2 = si2.getNumber();
+                }
+                // int count = sm.getActiveSubscriptionInfoCount();// real cards
+                // int max   = sm.getActiveSubscriptionInfoCountMax();// Slot number
+
+            } catch (Exception ex) {
+                ex.printStackTrace();
+            }
+        }
+    }
+
     // public boolean useSeparater
     public String getCmdid() {
         return mCmdid;