diff --git a/android/AndroidManifest.xml b/android/AndroidManifest.xml
index 8146ba78..dc69b1e3 100644
--- a/android/AndroidManifest.xml
+++ b/android/AndroidManifest.xml
@@ -15,10 +15,12 @@
                 android:name="ai.flow.android.LoadingActivity"
                 android:theme="@style/Theme.AppCompat.Light"
                 android:screenOrientation="landscape"
-                android:exported="true">
+                android:exported="true"
+                android:noHistory = "true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
+                <category android:name="android.intent.category.HOME"/>
             </intent-filter>
         </activity>
         <activity
diff --git a/android/src/main/java/ai.flow.android/AndroidLauncher.java b/android/src/main/java/ai.flow.android/AndroidLauncher.java
index 3ec89136..ea38b40f 100644
--- a/android/src/main/java/ai.flow.android/AndroidLauncher.java
+++ b/android/src/main/java/ai.flow.android/AndroidLauncher.java
@@ -95,7 +95,6 @@ protected void onCreate(Bundle savedInstanceState) {
 		//}
 
 		params = ParamsInterface.getInstance();
-		boolean f3 = params.existsAndCompare("F3", true);
 
 		TelephonyManager telephonyManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
 		String dongleID = "";
@@ -207,5 +206,10 @@ private Boolean checkVersionMisMatch() {
 	@Override
 	public void exit() {
 	}
+
+	@Override
+	public void onBackPressed() {
+		return;
+	}
 }
 
diff --git a/android/src/main/java/ai.flow.android/LoadingActivity.java b/android/src/main/java/ai.flow.android/LoadingActivity.java
index 69f720e3..30ad6580 100644
--- a/android/src/main/java/ai.flow.android/LoadingActivity.java
+++ b/android/src/main/java/ai.flow.android/LoadingActivity.java
@@ -97,6 +97,9 @@ public void run() {
 
                 Intent intent = new Intent(getApplicationContext(), AndroidLauncher.class);
                 startActivity(intent);
+
+                // destroy current activity
+                finish();
             }
         }).start();
     }
@@ -165,4 +168,9 @@ protected void onStop() {
     public void onDestroy() {
         super.onDestroy();
     }
+
+    @Override
+    public void onBackPressed() {
+        return;
+    }
 }
\ No newline at end of file