diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index 9cf09b5c..fd285d8a 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -549,8 +549,10 @@ public class MpMasterService extends Service {
     private void registerHeartbeatTimer() {
 
         long timeout = mHeartbeatDuration;
-        if (mMntnMode && mQuickHbMode) {
-            timeout = mQuickHeartbeatDuration;
+        if (mMntnMode) {
+            if (mQuickHbMode) {
+                timeout = mQuickHeartbeatDuration;
+            }
             registerHeartbeatTimer(System.currentTimeMillis() + timeout * 1000);
         } else {
             long closestTime = -1;
@@ -645,7 +647,7 @@ public class MpMasterService extends Service {
                     mCmdid = cmdid;
                 }
 
-                Log.i(TAG, "AppPath=" + appPath + " cmdid=" + cmdid);
+                logger.info("AppPath=" + appPath + " cmdid=" + cmdid);
 
                 // startMaster(false);
                 mHander.postDelayed(new Runnable() {
@@ -655,6 +657,10 @@ public class MpMasterService extends Service {
                     }
                 }, 5000);
 
+                // Reset Data Network
+                logger.info("Switch to Simcard 1");
+                SysApi.selectSimCard4Data(getApplicationContext(), 1);
+
                 registerHeartbeatTimer();
 
                 startMaster(false);
@@ -802,6 +808,36 @@ public class MpMasterService extends Service {
         return true;
     }
 
+    public static int getSignalLevel(int num) {
+        String result = getSystemProperty("vendor.ril.nw.signalstrength.lte." + Integer.toString(num));
+        if (TextUtils.isEmpty(result)) {
+            return 0;
+        }
+        String[] items = result.split(",");
+        int rsrp = -140;
+
+        if (items != null && items.length > 0) {
+            try {
+                rsrp = Integer.parseInt(items[0]);
+            } catch (Exception ex) {
+            }
+        }
+        int signalLevel = 0;
+        if (rsrp >= -97) {
+            signalLevel = 4;
+        } else if (rsrp >= -107) {
+            signalLevel = 3;
+        } else if (rsrp >= -117) {
+            signalLevel = 2;
+        } else if (rsrp >= -125) {
+            signalLevel = 1;
+        } else if (rsrp >= -140) {
+            signalLevel = 0;
+        }
+
+        return signalLevel;
+    }
+
     public void downloadAndInstall(final String url) {
 
         final Context context = getApplicationContext();