diff --git a/testapps/SmsManagerTestApp/Android.bp b/testapps/SmsManagerTestApp/Android.bp
index e451b2d..4d4afcb 100644
--- a/testapps/SmsManagerTestApp/Android.bp
+++ b/testapps/SmsManagerTestApp/Android.bp
@@ -10,5 +10,7 @@
 android_app {
     name: "SmsManagerTestApp",
     srcs: ["src/**/*.java"],
-    sdk_version: "current",
+    platform_apis: true,
+    certificate: "platform",
+    privileged: true,
 }
diff --git a/testapps/SmsManagerTestApp/AndroidManifest.xml b/testapps/SmsManagerTestApp/AndroidManifest.xml
index 7dc717f..1be2b2d 100644
--- a/testapps/SmsManagerTestApp/AndroidManifest.xml
+++ b/testapps/SmsManagerTestApp/AndroidManifest.xml
@@ -21,6 +21,7 @@
          android:targetSdkVersion="29"/>
     <uses-permission android:name="android.permission.SEND_SMS"/>
     <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
+    <uses-permission android:name="android.permission.PERFORM_IMS_SINGLE_REGISTRATION"/>
     <application android:label="SmsManagerTestApp">
         <activity android:name=".SmsManagerTestApp"
              android:label="SmsManagerTestApp"
@@ -54,6 +55,7 @@
 
         <!-- Fake BroadcastReceiver that listens for incoming SMS messages -->
         <receiver android:name=".SmsReceiver"
+                  android:exported="true"
                   android:permission="android.permission.BROADCAST_SMS">
             <intent-filter>
                 <action android:name="android.provider.Telephony.SMS_DELIVER" />
@@ -62,7 +64,8 @@
 
         <!-- Fake BroadcastReceiver that listens for incoming MMS messages -->
         <receiver android:name=".MmsReceiver"
-                  android:permission="android.permission.BROADCAST_WAP_PUSH">
+                  android:permission="android.permission.BROADCAST_WAP_PUSH"
+                  android:exported="true">
             <intent-filter>
                 <action android:name="android.provider.Telephony.WAP_PUSH_DELIVER" />
                 <data android:mimeType="application/vnd.wap.mms-message" />
@@ -70,7 +73,7 @@
         </receiver>
 
         <!-- Fake Activity that allows the user to send new SMS/MMS messages -->
-        <activity android:name=".ComposeSmsActivity" >
+        <activity android:name=".ComposeSmsActivity" android:exported="true" >
             <intent-filter>
                 <action android:name="android.intent.action.SEND" />
                 <action android:name="android.intent.action.SENDTO" />
diff --git a/testapps/SmsManagerTestApp/res/layout/activity_main.xml b/testapps/SmsManagerTestApp/res/layout/activity_main.xml
index 185e0e2..d889936 100644
--- a/testapps/SmsManagerTestApp/res/layout/activity_main.xml
+++ b/testapps/SmsManagerTestApp/res/layout/activity_main.xml
@@ -75,5 +75,11 @@
             android:layout_height="wrap_content"
             android:paddingRight="4dp"
             android:text="@string/disable_persistent_service"/>
+        <Button
+            android:id="@+id/check_single_reg_permission"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:paddingRight="4dp"
+            android:text="@string/check_single_reg_permission"/>
     </LinearLayout>
-</LinearLayout>
\ No newline at end of file
+</LinearLayout>
diff --git a/testapps/SmsManagerTestApp/res/values/donottranslate_strings.xml b/testapps/SmsManagerTestApp/res/values/donottranslate_strings.xml
index c8b9f91..7383a4a 100644
--- a/testapps/SmsManagerTestApp/res/values/donottranslate_strings.xml
+++ b/testapps/SmsManagerTestApp/res/values/donottranslate_strings.xml
@@ -21,4 +21,5 @@
     <string name="get_sub_for_result_button">Ask user for sub id.</string>
     <string name="enable_persistent_service">Enable Persistent Service</string>
     <string name="disable_persistent_service">Disable Persistent Service</string>
-</resources>
\ No newline at end of file
+    <string name="check_single_reg_permission">Check RCS Single Reg Perm</string>
+</resources>
diff --git a/testapps/SmsManagerTestApp/src/com/android/phone/testapps/smsmanagertestapp/SmsManagerTestApp.java b/testapps/SmsManagerTestApp/src/com/android/phone/testapps/smsmanagertestapp/SmsManagerTestApp.java
index 785fe3f..cc3769e 100644
--- a/testapps/SmsManagerTestApp/src/com/android/phone/testapps/smsmanagertestapp/SmsManagerTestApp.java
+++ b/testapps/SmsManagerTestApp/src/com/android/phone/testapps/smsmanagertestapp/SmsManagerTestApp.java
@@ -44,6 +44,10 @@
     private static final ComponentName SETTINGS_SUB_PICK_ACTIVITY = new ComponentName(
             "com.android.settings", "com.android.settings.sim.SimDialogActivity");
 
+    // Can't import PERFORM_IMS_SINGLE_REGISTRATION const directly beause it's a @SystemApi
+    private static final String PERFORM_IMS_SINGLE_REGISTRATION =
+            "android.permission.PERFORM_IMS_SINGLE_REGISTRATION";
+
     /*
      * Forwarded constants from SimDialogActivity.
      */
@@ -70,6 +74,8 @@
                 .setOnClickListener(this::setPersistentServiceComponentEnabled);
         findViewById(R.id.disable_persistent_service)
                 .setOnClickListener(this::setPersistentServiceComponentDisabled);
+        findViewById(R.id.check_single_reg_permission)
+                .setOnClickListener(this::checkSingleRegPermission);
         mPhoneNumber = (EditText) findViewById(R.id.phone_number_text);
     }
 
@@ -201,6 +207,17 @@
                 PackageManager.DONT_KILL_APP);
     }
 
+    private void checkSingleRegPermission(View view) {
+        if (checkSelfPermission(PERFORM_IMS_SINGLE_REGISTRATION)
+                == PackageManager.PERMISSION_GRANTED) {
+            Toast.makeText(this, "Single Reg permission granted",
+                    Toast.LENGTH_SHORT).show();
+        } else {
+            Toast.makeText(this, "Single Reg permission NOT granted",
+                    Toast.LENGTH_SHORT).show();
+        }
+
+    }
 
     private Intent getSendStatusIntent() {
         // Encode requestId in intent data