diff --git a/mpmaster/src/main/AndroidManifest.xml b/mpmaster/src/main/AndroidManifest.xml
index 74f77bcb..2e8ff058 100644
--- a/mpmaster/src/main/AndroidManifest.xml
+++ b/mpmaster/src/main/AndroidManifest.xml
@@ -13,6 +13,8 @@
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
     <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
     <uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />
+    <uses-permission android:name="android.permission.READ_LOGS" />
+    <uses-permission android:name="android.permission.PACKAGE_USAGE_STATS" />
     <uses-permission
         android:name="android.permission.FORCE_STOP_PACKAGES"
         tools:ignore="ProtectedPermissions" />
diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
index 2507cf59..e1b82b7f 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
@@ -120,7 +120,7 @@ public class AppMaster {
         return (System.currentTimeMillis() - SystemClock.elapsedRealtimeNanos() / 1000000) / 1000;
     }
 
-    public void start() {
+    public void start(final boolean isCriticalTime) {
 
         new Thread(new Runnable() {
 
@@ -160,7 +160,7 @@ public class AppMaster {
                         }
 
                         try {
-                            runImpl();
+                            runImpl(isCriticalTime);
                         } catch (Exception ex) {
                             ex.printStackTrace();
                         }
@@ -177,7 +177,7 @@ public class AppMaster {
                     }
                 } else {
                     try {
-                        runImpl();
+                        runImpl(isCriticalTime);
                     } catch (Exception ex) {
                         ex.printStackTrace();
                     }
@@ -186,7 +186,7 @@ public class AppMaster {
         }).start();
     }
 
-    private boolean runImpl() {
+    private boolean runImpl(final boolean isCriticalTime) {
         String masterUrl = mMasterUrl;
 
         if (TextUtils.isEmpty(masterUrl)) {
@@ -201,8 +201,10 @@ public class AppMaster {
         now.setMinutes(0);
         now.setSeconds(0);
 
-        long startTime = now.getTime() / 1000;
-        long endTime = startTime + 86400 - 1;
+        final long startTimeMs = now.getTime();
+        final long startTime = startTimeMs / 1000;
+        final long endTimeMs = startTimeMs + 86400000 - 1;
+        final long endTime = startTime + 86400 - 1;
 
         String startTimeStr = Integer.toString(now.getYear()) + (now.getMonth() < 10 ? "0" : "") + Integer.toString(now.getMonth()) + (now.getDate() < 10 ? "0" : "") + Integer.toString(now.getDate());
 
@@ -231,13 +233,21 @@ public class AppMaster {
             postParams.add(new Pair<String, String>("signalLevel1", Integer.toString(MpMasterService.getSignalLevel(1))));
             postParams.add(new Pair<String, String>("signalLevel2", Integer.toString(MpMasterService.getSignalLevel(2))));
 
-            // SysApi.
-            postParams.add(new Pair<String, String>("simcard1", mService.getIccid(1)));
-            // if (mService.isSeparateNetwork()) {
-            postParams.add(new Pair<String, String>("simcard2", mService.getIccid(2)));
-            // }
+            if (isCriticalTime) {
+                // SysApi.
+                postParams.add(new Pair<String, String>("simcard1", mService.getIccid(1)));
+                // if (mService.isSeparateNetwork()) {
+                postParams.add(new Pair<String, String>("simcard2", mService.getIccid(2)));
+
+                postParams.add(new Pair<String, String>("freeROM", getFreeROM()));
 
-            postParams.add(new Pair<String, String>("freeROM", getFreeROM()));
+                /*
+                String crashTimes = getCrashTimes(startTimeMs, endTimeMs);
+                if (!TextUtils.isEmpty(crashTimes)) {
+                    postParams.add(new Pair<String, String>("crashes", crashTimes));
+                }
+                 */
+            }
 
             buildStats(startTime, postParams);
 
@@ -442,6 +452,35 @@ public class AppMaster {
         }
     }
 
+    private String getCrashTimes(final long startTimeMs, final long endTimeMs) {
+        String path = "/data/system/dropbox/";
+        final String prefixFileName = "data_app_crash@";
+        final int[] cnts = new int[2];
+        cnts[0] = 0;
+        cnts[1] = 0;
+
+        long weekStartTime = startTimeMs - 86400000 * 7;
+        FileFilter fileFilter = new FileFilter() {
+            @Override
+            public boolean accept(File pathname) {
+                if (pathname.isFile() && pathname.getName().startsWith(prefixFileName) && pathname.lastModified() <= endTimeMs) {
+                    if (pathname.lastModified() >= startTimeMs) {
+                        cnts[0]++;
+                    }
+                    // if (pathname.lastModified() >= weekStartTime) {
+                        cnts[1]++;
+                    // }
+                }
+                return false;
+            }
+        };
+        File file = new File(path);
+        String[] files = file.list();
+        File[] subFiles = file.listFiles(fileFilter);
+
+        return ((cnts[0] == 0) && (cnts[1] == 0)) ? null : Integer.toString(cnts[0]) + " " + Integer.toString(cnts[1]);
+    }
+
     private String getBatteryVoltage() {
         int val = 0;
         for (int idx = 0; idx < 3; idx++) {
diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index c338223d..0953daeb 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -81,6 +81,7 @@ public class MpMasterService extends Service {
     private SmsSendReceiver mSmsSnedReceiver;
 
     private int mPrevDateForLogs = 0;
+    private int mMasterTimers = 0;
 
     public static class STATE_SERVICE {
         public static final int CONNECTED = 10;
@@ -477,6 +478,14 @@ public class MpMasterService extends Service {
         }
     }
 
+    public boolean isCriticalTime() {
+        if (mSeparateNetwork) {
+            return true;
+        }
+
+        return (mMasterTimers % 12) == 0;
+    }
+
     private void startMaster(boolean bundleWithMpApp) {
         String masterUrl = MicroPhotoContext.DEFAULT_MASTER_URL;
 
@@ -493,8 +502,10 @@ public class MpMasterService extends Service {
 
         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();
+        appMaster.start(isCriticalTime());
+        mMasterTimers++;
     }
 
     public static class AlarmReceiver extends BroadcastReceiver {