diff --git a/src/com/android/phone/PhoneInterfaceManager.java b/src/com/android/phone/PhoneInterfaceManager.java
index 536c88a..85c0b04 100644
--- a/src/com/android/phone/PhoneInterfaceManager.java
+++ b/src/com/android/phone/PhoneInterfaceManager.java
@@ -14727,6 +14727,24 @@
         }
     }
 
+
+    /**
+     * Inform whether application supports NTN SMS in satellite mode.
+     *
+     * This method is used by default messaging application to inform framework whether it supports
+     * NTN SMS or not.
+     *
+     * @param ntnSmsSupported {@code true} If application supports NTN SMS, else {@code false}.
+     *
+     * @throws SecurityException if the caller doesn't have required permission.
+     */
+    @Override
+    public void setNtnSmsSupported(boolean ntnSmsSupported) {
+        enforceSatelliteCommunicationPermission("setNtnSmsSupported");
+        enforceSendSmsPermission();
+        mSatelliteController.setNtnSmsSupportedByMessagesApp(ntnSmsSupported);
+    }
+
     /**
      * This API can be used by only CTS to override the cached value for the device overlay config
      * value :
diff --git a/testapps/TestSatelliteApp/AndroidManifest.xml b/testapps/TestSatelliteApp/AndroidManifest.xml
index eaddf95..a1f22fa 100644
--- a/testapps/TestSatelliteApp/AndroidManifest.xml
+++ b/testapps/TestSatelliteApp/AndroidManifest.xml
@@ -20,6 +20,7 @@
     <uses-permission android:name="android.permission.BIND_SATELLITE_SERVICE"/>
     <uses-permission android:name="android.permission.SATELLITE_COMMUNICATION"/>
     <uses-permission android:name="android.permission.READ_PRIVILEGED_PHONE_STATE"/>
+    <uses-permission android:name="android.permission.SEND_SMS"/>
     <application android:label="SatelliteTestApp">
         <activity android:name=".SatelliteTestApp"
              android:label="SatelliteTestApp"
diff --git a/testapps/TestSatelliteApp/res/layout/activity_TestSatelliteWrapper.xml b/testapps/TestSatelliteApp/res/layout/activity_TestSatelliteWrapper.xml
index 9aec52b..d046f03 100644
--- a/testapps/TestSatelliteApp/res/layout/activity_TestSatelliteWrapper.xml
+++ b/testapps/TestSatelliteApp/res/layout/activity_TestSatelliteWrapper.xml
@@ -191,6 +191,19 @@
             android:layout_height="wrap_content"
             android:paddingRight="4dp"
             android:text="@string/deprovisionSatellite"/>
+        <Button
+            android:id="@+id/setNtnSmsSupportedTrue"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:paddingRight="4dp"
+            android:text="@string/setNtnSmsSupportedTrue"/>
+        <Button
+            android:id="@+id/setNtnSmsSupportedFalse"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:paddingRight="4dp"
+            android:text="@string/setNtnSmsSupportedFalse"/>
+
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
diff --git a/testapps/TestSatelliteApp/res/values/donottranslate_strings.xml b/testapps/TestSatelliteApp/res/values/donottranslate_strings.xml
index 54f2722..4b5ea5b 100644
--- a/testapps/TestSatelliteApp/res/values/donottranslate_strings.xml
+++ b/testapps/TestSatelliteApp/res/values/donottranslate_strings.xml
@@ -97,6 +97,9 @@
     <string name="requestSatelliteSubscriberProvisionStatus">requestSatelliteSubscriberProvisionStatus</string>
     <string name="provisionSatellite">provisionSatellite</string>
     <string name="deprovisionSatellite">deprovisionSatellite</string>
+    <string name="setNtnSmsSupportedTrue">setNtnSmsSupportedTrue</string>
+    <string name="setNtnSmsSupportedFalse">setNtnSmsSupportedFalse</string>
+
 
     <string name="Back">Back</string>
     <string name="ClearLog">Clear Log</string>
diff --git a/testapps/TestSatelliteApp/src/com/android/phone/testapps/satellitetestapp/SatelliteTestApp.java b/testapps/TestSatelliteApp/src/com/android/phone/testapps/satellitetestapp/SatelliteTestApp.java
index 7c4ae00..cb56e87 100644
--- a/testapps/TestSatelliteApp/src/com/android/phone/testapps/satellitetestapp/SatelliteTestApp.java
+++ b/testapps/TestSatelliteApp/src/com/android/phone/testapps/satellitetestapp/SatelliteTestApp.java
@@ -16,11 +16,13 @@
 
 package com.android.phone.testapps.satellitetestapp;
 
+import android.Manifest;
 import android.app.Activity;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.ServiceConnection;
+import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.telephony.satellite.stub.SatelliteDatagram;
@@ -42,6 +44,7 @@
 
     private TestSatelliteServiceConnection mSatelliteServiceConn;
     private List<SatelliteDatagram> mSentSatelliteDatagrams = new ArrayList<>();
+    private static final int REQUEST_CODE_SEND_SMS = 1;
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
@@ -105,6 +108,16 @@
         });
     }
 
+    @Override
+    protected void onResume() {
+        super.onResume();
+        if (checkSelfPermission(Manifest.permission.SEND_SMS)
+                != PackageManager.PERMISSION_GRANTED) {
+            requestPermissions(new String[]{Manifest.permission.SEND_SMS}, REQUEST_CODE_SEND_SMS);
+        }
+    }
+
+
     private final ILocalSatelliteListener mSatelliteListener =
             new ILocalSatelliteListener.Stub() {
                 @Override
diff --git a/testapps/TestSatelliteApp/src/com/android/phone/testapps/satellitetestapp/TestSatelliteWrapper.java b/testapps/TestSatelliteApp/src/com/android/phone/testapps/satellitetestapp/TestSatelliteWrapper.java
index 97cb9c3..7d5e9af 100644
--- a/testapps/TestSatelliteApp/src/com/android/phone/testapps/satellitetestapp/TestSatelliteWrapper.java
+++ b/testapps/TestSatelliteApp/src/com/android/phone/testapps/satellitetestapp/TestSatelliteWrapper.java
@@ -127,6 +127,11 @@
                 .setOnClickListener(this::provisionSatellite);
         findViewById(R.id.deprovisionSatelliteWrapper)
                 .setOnClickListener(this::deprovisionSatellite);
+        findViewById(R.id.setNtnSmsSupportedTrue)
+                .setOnClickListener(this::setNtnSmsSupportedTrue);
+        findViewById(R.id.setNtnSmsSupportedFalse)
+                .setOnClickListener(this::setNtnSmsSupportedFalse);
+
 
         findViewById(R.id.Back).setOnClickListener(new OnClickListener() {
             @Override
@@ -799,6 +804,31 @@
         }
     }
 
+    private void setNtnSmsSupportedTrue(View view) {
+        setNtnSmsSupported(true);
+    }
+
+    private void setNtnSmsSupportedFalse(View view) {
+        setNtnSmsSupported(false);
+    }
+
+    private void setNtnSmsSupported(boolean ntnSmsSupported) {
+        String msg = "setNtnSmsSupported:" + ntnSmsSupported;
+        addLogMessage(msg);
+        logd(msg);
+
+        try {
+            mSatelliteManagerWrapper.setNtnSmsSupported(ntnSmsSupported);
+            msg = "setNtnSmsSupported=" + ntnSmsSupported + " is successful";
+            logd(msg);
+            addLogMessage(msg);
+        } catch (SecurityException | IllegalStateException ex) {
+            msg = "setNtnSmsSupported=" + ntnSmsSupported + " failed. " + ex.getMessage();
+            logd(msg);
+            addLogMessage(msg);
+        }
+    }
+
     private int getActiveSubId() {
         int subId;
         List<SubscriptionInfo> subscriptionInfoList =