diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index b7f380c..b01a928 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -33,6 +33,7 @@
     <uses-permission android:name="android.permission.WAKE_LOCK" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
     <uses-permission android:name="android.permission.SUBSTITUTE_NOTIFICATION_APP_NAME" />
+    <uses-permission android:name="android.permission.HIDE_NON_SYSTEM_OVERLAY_WINDOWS"/>
 
     <application android:icon="@drawable/ic_launcher_sim_toolkit"
         android:label="@string/app_name"
diff --git a/src/com/android/stk/StkInputActivity.java b/src/com/android/stk/StkInputActivity.java
index 9d4b177..6cd8637 100644
--- a/src/com/android/stk/StkInputActivity.java
+++ b/src/com/android/stk/StkInputActivity.java
@@ -16,8 +16,6 @@
 
 package com.android.stk;
 
-import android.app.ActionBar;
-import android.app.Activity;
 import android.app.AlarmManager;
 import android.content.Context;
 import android.content.Intent;
@@ -151,7 +149,8 @@
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-
+        getWindow().addSystemFlags(
+                WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         CatLog.d(LOG_TAG, "onCreate - mIsResponseSent[" + mIsResponseSent + "]");
 
         // appService can be null if this activity is automatically recreated by the system
diff --git a/src/com/android/stk/StkLauncherActivity.java b/src/com/android/stk/StkLauncherActivity.java
index f1100b2..79233cb 100644
--- a/src/com/android/stk/StkLauncherActivity.java
+++ b/src/com/android/stk/StkLauncherActivity.java
@@ -23,6 +23,7 @@
 import android.os.Bundle;
 import android.view.View;
 import android.view.KeyEvent;
+import android.view.WindowManager;
 import android.widget.ImageView;
 import android.widget.ListView;
 import android.widget.TextView;
@@ -32,7 +33,6 @@
 import com.android.internal.telephony.cat.Item;
 import com.android.internal.telephony.cat.Menu;
 import com.android.internal.telephony.cat.CatLog;
-import com.android.internal.telephony.PhoneConstants;
 
 import android.telephony.TelephonyManager;
 
@@ -58,6 +58,8 @@
     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
+        getWindow().addSystemFlags(
+                WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         CatLog.d(LOG_TAG, "onCreate+");
         mContext = getBaseContext();
         mTm = (TelephonyManager) mContext.getSystemService(
diff --git a/src/com/android/stk/StkMain.java b/src/com/android/stk/StkMain.java
index 0899d2b..e732152 100644
--- a/src/com/android/stk/StkMain.java
+++ b/src/com/android/stk/StkMain.java
@@ -20,14 +20,13 @@
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
-import android.view.View;
 
 import com.android.internal.telephony.cat.CatLog;
-import com.android.internal.telephony.PhoneConstants;
 
 import android.telephony.TelephonyManager;
 
 import android.view.Gravity;
+import android.view.WindowManager;
 import android.widget.Toast;
 
 /**
@@ -47,6 +46,8 @@
     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
+        getWindow().addSystemFlags(
+                WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         CatLog.d(LOG_TAG, "onCreate+");
         mContext = getBaseContext();
         mTm = (TelephonyManager) mContext.getSystemService(
diff --git a/src/com/android/stk/StkMenuActivity.java b/src/com/android/stk/StkMenuActivity.java
index b35877f..f7c2e30 100644
--- a/src/com/android/stk/StkMenuActivity.java
+++ b/src/com/android/stk/StkMenuActivity.java
@@ -31,6 +31,7 @@
 import android.view.KeyEvent;
 import android.view.MenuItem;
 import android.view.View;
+import android.view.WindowManager;
 import android.widget.AdapterView;
 import android.widget.ImageView;
 import android.widget.ListView;
@@ -85,7 +86,8 @@
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-
+        getWindow().addSystemFlags(
+                WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         CatLog.d(LOG_TAG, "onCreate");
 
         ActionBar actionBar = getActionBar();