diff --git a/res/layout/telecom_developer_menu.xml b/res/layout/telecom_developer_menu.xml
new file mode 100644
index 0000000..0df0cdd
--- /dev/null
+++ b/res/layout/telecom_developer_menu.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2018 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License
+  -->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:orientation="vertical"
+              android:layout_width="fill_parent"
+              android:layout_height="fill_parent">
+
+    <Switch
+        android:id="@+id/switchEnhancedCallBlocking"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/developer_enhanced_call_blocking"/>
+</LinearLayout>
\ No newline at end of file
diff --git a/res/values/strings.xml b/res/values/strings.xml
index bb63ad2..8c29a21 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -285,4 +285,10 @@
     <string name="phone_strings_emergency_call_made_dialog_title_txt">Emergency call made</string>
     <!-- Notification details that appear when the user taps the notification "phone_strings_call_blocking_turned_off_notification_text_txt". -->
     <string name="phone_strings_emergency_call_made_dialog_call_blocking_text_txt">Call Blocking has been disabled to allow emergency responders to contact you.</string>
+    <!-- Window title used for the Telecom Developer Menu -->
+    <string name="developer_title">Telecom Developer Menu</string>
+    <!-- Label for a switch in the Telecom Developer Menu which is used to enable the enhanced call
+         blocking functionality (for test purposes).
+         DO NOT TRANSLATE -->
+    <string name="developer_enhanced_call_blocking" translatable="false">Enhanced Call Blocking</string>
 </resources>