diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 73e6c83..08d96a6 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -73,6 +73,10 @@
    presses home. -->
   <uses-permission android:name="android.permission.STOP_APP_SWITCHES"/>
 
+  <!-- Used for sending PendingIntents to dynamically registered receivers -->
+  <uses-permission android:name="com.android.dialer.permission.DIALER_ORIGIN"
+    android:protectionLevel="signature" />
+
   <!-- Permissions needed for badger count showing on launch icon. -->
 
   <!--for Samsung-->
diff --git a/java/com/android/dialer/voicemail/listui/error/VoicemailErrorMessage.java b/java/com/android/dialer/voicemail/listui/error/VoicemailErrorMessage.java
index 14d6cff..a3c294d 100644
--- a/java/com/android/dialer/voicemail/listui/error/VoicemailErrorMessage.java
+++ b/java/com/android/dialer/voicemail/listui/error/VoicemailErrorMessage.java
@@ -150,7 +150,7 @@
           public void onClick(View v) {
             Logger.get(context)
                 .logImpression(DialerImpression.Type.VOICEMAIL_ALERT_SET_PIN_CLICKED);
-            Intent intent = new Intent(VoicemailChangePinActivity.ACTION_CHANGE_PIN);
+            Intent intent = new Intent(context, VoicemailChangePinActivity.class);
             intent.putExtra(VoicemailClient.PARAM_PHONE_ACCOUNT_HANDLE, phoneAccountHandle);
             context.startActivity(intent);
           }
diff --git a/java/com/android/dialer/voicemail/settings/AndroidManifest.xml b/java/com/android/dialer/voicemail/settings/AndroidManifest.xml
index 8506ddd..f25858e 100644
--- a/java/com/android/dialer/voicemail/settings/AndroidManifest.xml
+++ b/java/com/android/dialer/voicemail/settings/AndroidManifest.xml
@@ -29,10 +29,6 @@
         android:parentActivityName="com.android.dialer.app.settings.DialerSettingsActivity"
         android:theme="@style/SettingsStyle"
         android:windowSoftInputMode="stateVisible|adjustResize">
-      <intent-filter>
-        <action android:name="com.android.dialer.action.CHANGE_PIN"/>
-        <category android:name="android.intent.category.DEFAULT"/>
-      </intent-filter>
     </activity>
     <activity
         android:name=".RecordVoicemailGreetingActivity"
diff --git a/java/com/android/dialer/voicemail/settings/VoicemailChangePinActivity.java b/java/com/android/dialer/voicemail/settings/VoicemailChangePinActivity.java
index 4e22fb3..ebebdf7 100644
--- a/java/com/android/dialer/voicemail/settings/VoicemailChangePinActivity.java
+++ b/java/com/android/dialer/voicemail/settings/VoicemailChangePinActivity.java
@@ -67,7 +67,6 @@
     implements OnClickListener, OnEditorActionListener, TextWatcher {
 
   private static final String TAG = "VmChangePinActivity";
-  public static final String ACTION_CHANGE_PIN = "com.android.dialer.action.CHANGE_PIN";
 
   private static final int MESSAGE_HANDLE_RESULT = 1;
 
diff --git a/java/com/android/voicemail/impl/sms/StatusSmsFetcher.java b/java/com/android/voicemail/impl/sms/StatusSmsFetcher.java
index 7ddf646..335ec3e 100644
--- a/java/com/android/voicemail/impl/sms/StatusSmsFetcher.java
+++ b/java/com/android/voicemail/impl/sms/StatusSmsFetcher.java
@@ -53,8 +53,12 @@
 
   private static final long STATUS_SMS_TIMEOUT_MILLIS = 60_000;
 
+  private static final String PERMISSION_DIALER_ORIGIN =
+    "com.android.dialer.permission.DIALER_ORIGIN";
+
   private static final String ACTION_REQUEST_SENT_INTENT =
       "com.android.voicemailomtp.sms.REQUEST_SENT";
+
   private static final int ACTION_REQUEST_SENT_REQUEST_CODE = 0;
 
   private CompletableFuture<Bundle> future = new CompletableFuture<>();
@@ -67,7 +71,7 @@
     this.phoneAccountHandle = phoneAccountHandle;
     IntentFilter filter = new IntentFilter(ACTION_REQUEST_SENT_INTENT);
     filter.addAction(OmtpService.ACTION_SMS_RECEIVED);
-    context.registerReceiver(this, filter);
+    context.registerReceiver(this, filter, PERMISSION_DIALER_ORIGIN, /* scheduler= */ null);
   }
 
   @Override
@@ -89,7 +93,10 @@
     // Because the receiver is registered dynamically, implicit intent must be used.
     // There should only be a single status SMS request at a time.
     return PendingIntent.getBroadcast(
-        context, ACTION_REQUEST_SENT_REQUEST_CODE, intent, PendingIntent.FLAG_CANCEL_CURRENT);
+        context,
+        ACTION_REQUEST_SENT_REQUEST_CODE,
+        intent,
+        PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_IMMUTABLE);
   }
 
   @Override