diff --git a/mpres/src/main/java/com/xypower/mpres/MainActivity.java b/mpres/src/main/java/com/xypower/mpres/MainActivity.java
index 8e987bde..c49a5133 100644
--- a/mpres/src/main/java/com/xypower/mpres/MainActivity.java
+++ b/mpres/src/main/java/com/xypower/mpres/MainActivity.java
@@ -16,9 +16,14 @@ import com.dev.devapi.api.SysApi;
 import com.xypower.common.FilesUtils;
 import com.xypower.common.MicroPhotoContext;
 
+import org.json.JSONException;
+import org.json.JSONObject;
+
 import java.io.File;
 import java.io.FileOutputStream;
+import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStreamWriter;
 
 public class MainActivity extends AppCompatActivity {
 
@@ -32,13 +37,15 @@ public class MainActivity extends AppCompatActivity {
         int initres = intent.getIntExtra("initres", 0);
         if (initres != 0) {
             mHandler = new Handler();
+            final String sn = intent.getStringExtra("sn");
+
             Runnable runnable = new Runnable() {
                 @Override
                 public void run() {
                     notifyMpApp();
                 }
             };
-            initMpAppConfigurations(getApplicationContext(), mHandler, runnable);
+            initMpAppConfigurations(getApplicationContext(), mHandler, sn, runnable);
         }
     }
 
@@ -48,7 +55,7 @@ public class MainActivity extends AppCompatActivity {
         System.exit(0);
     }
 
-    public static boolean initMpAppConfigurations(final Context context, final Handler handler, final Runnable runnable) {
+    public static boolean initMpAppConfigurations(final Context context, final Handler handler, final String sn, final Runnable runnable) {
 
         boolean existed = true;
         String destPath = MicroPhotoContext.buildMpAppDir(context);
@@ -103,6 +110,38 @@ public class MainActivity extends AppCompatActivity {
                 }
                 copyAssetsDir(context, "mpapp/data", tmpDestPath.getAbsolutePath());
 
+                if (!TextUtils.isEmpty(sn)) {
+                    // Update SN into App.json
+                    File appFile = new File(tmpDestPath, "App.json");
+                    try {
+                        if (appFile.exists()) {
+
+                            long mtime = appFile.lastModified();
+                            String content = FilesUtils.readTextFile(appFile.getAbsolutePath());
+
+                            JSONObject jsonObject = TextUtils.isEmpty(content) ? new JSONObject() : new JSONObject(content);
+                            jsonObject.put("CMDID", sn);
+
+                            FileOutputStream fos = null;
+                            OutputStreamWriter outputStreamWriter = null;
+                            try {
+                                fos = new FileOutputStream(appFile);
+                                outputStreamWriter = new OutputStreamWriter(fos, "UTF-8");
+                                outputStreamWriter.write(jsonObject.toString());
+                            } catch (IOException e) {
+                                e.printStackTrace();
+                            }finally {
+                                FilesUtils.closeFriendly(outputStreamWriter);
+                                FilesUtils.closeFriendly(fos);
+                            }
+
+                            appFile.setLastModified(mtime);
+                        }
+                    } catch (JSONException e) {
+                        e.printStackTrace();
+                    }
+                }
+
                 handler.postDelayed(runnable, 0);
             }
         };