diff --git a/java/com/android/dialer/spam/Spam.java b/java/com/android/dialer/spam/Spam.java
index 99deb13..09b7ce9 100644
--- a/java/com/android/dialer/spam/Spam.java
+++ b/java/com/android/dialer/spam/Spam.java
@@ -16,6 +16,8 @@
 
 package com.android.dialer.spam;
 
+import android.content.Context;
+import android.content.Intent;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import com.android.dialer.DialerPhoneNumber;
@@ -33,6 +35,8 @@
 
   boolean isSpamNotificationEnabled();
 
+  boolean isSpamBlockingAvailable();
+
   boolean isSpamBlockingEnabled();
 
   boolean isDialogEnabledForSpamNotification();
@@ -180,10 +184,28 @@
       ReportingLocation.Type from,
       ContactSource.Type contactSourceType);
 
+  /**
+   * Modifies spam blocking setting.
+   *
+   * @param enabled Whether to enable or disable the setting.
+   * @param listener The callback to be invoked after setting change is done.
+   */
+  void modifySpamBlockingSetting(boolean enabled, ModifySettingListener listener);
+
+  /** Returns an intent to start spam blocking setting */
+  Intent getSpamBlockingSettingIntent(Context context);
+
   /** Callback to be invoked when data is fetched. */
   interface Listener {
 
     /** Called when data is fetched. */
     void onComplete(boolean isSpam);
   }
+
+  /** Callback to be invoked when setting change completes. */
+  interface ModifySettingListener {
+
+    /** Called when setting change completes. */
+    void onComplete(boolean success);
+  }
 }
diff --git a/java/com/android/dialer/spam/SpamStub.java b/java/com/android/dialer/spam/SpamStub.java
index 15d9d76..39b05fc 100644
--- a/java/com/android/dialer/spam/SpamStub.java
+++ b/java/com/android/dialer/spam/SpamStub.java
@@ -16,6 +16,8 @@
 
 package com.android.dialer.spam;
 
+import android.content.Context;
+import android.content.Intent;
 import com.android.dialer.DialerPhoneNumber;
 import com.android.dialer.common.concurrent.Annotations.BackgroundExecutor;
 import com.android.dialer.logging.ContactLookupResult;
@@ -50,6 +52,11 @@
   }
 
   @Override
+  public boolean isSpamBlockingAvailable() {
+    return false;
+  }
+
+  @Override
   public boolean isSpamBlockingEnabled() {
     return false;
   }
@@ -161,4 +168,14 @@
       int callType,
       ReportingLocation.Type from,
       ContactSource.Type contactSourceType) {}
+
+  @Override
+  public void modifySpamBlockingSetting(boolean enabled, ModifySettingListener listener) {
+    listener.onComplete(false);
+  }
+
+  @Override
+  public Intent getSpamBlockingSettingIntent(Context context) {
+    return new Intent();
+  }
 }