diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
index 295689f6..b243e340 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
@@ -663,8 +663,6 @@ public class AppMaster {
                 return;
             }
 
-
-
             JSONObject jsonFrp = new JSONObject(frp);
             String server = jsonFrp.optString("server_addr");
             int port = jsonFrp.optInt("server_port", 7000);
diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index b2971516..e112bd68 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -469,7 +469,7 @@ public class MpMasterService extends Service {
 
         MicroPhotoContext.AppConfig appConfig = MicroPhotoContext.getMpAppConfig(getApplicationContext());
 
-        logger.warning("Start Mntn report: " + masterUrl + " Mntn Mode=" + Boolean.toString(mMntnMode) + " QuickHB=" + Boolean.toString(mQuickHbMode));
+        logger.warning("Start Mntn report: " + masterUrl + " MntnMode=" + (mMntnMode ? "1" : "0") + " QuickHB=" + (mQuickHbMode ? "1" : "0"));
 
         AppMaster appMaster = new AppMaster(this, masterUrl, appConfig.cmdid, bundleWithMpApp);
         appMaster.start();
@@ -632,7 +632,7 @@ public class MpMasterService extends Service {
                     registerHeartbeatTimer(zeroPoint + closestTime * 1000, keepAlive);
                 }
             } else {
-                if (mPreviousHeartbeatTime - currentTimeMs < mHeartbeatDuration * 1000) {
+                if ((mPreviousHeartbeatTime != 0) && (mPreviousHeartbeatTime - currentTimeMs < mHeartbeatDuration * 1000)) {
                     registerHeartbeatTimer(mPreviousHeartbeatTime + mHeartbeatDuration * 1000, keepAlive);
                 } else {
                     registerHeartbeatTimer(currentTimeMs + timeout * 1000, keepAlive);
@@ -970,6 +970,8 @@ public class MpMasterService extends Service {
                 if (subIds != null && subIds.length > 0) {
                     setDefaultDataSubId(subIds[0]);
                     logger.info("Switched To SimCard: " + Integer.toString(num));
+                } else {
+                    logger.warning("NO available network for simcard " + Integer.toString(num));
                 }
             }
         } else {