diff --git a/MyTracks/AndroidManifest.xml b/MyTracks/AndroidManifest.xml
index c3a1c4874..3f9c8689a 100755
--- a/MyTracks/AndroidManifest.xml
+++ b/MyTracks/AndroidManifest.xml
@@ -12,7 +12,7 @@
                android:value="AEdPqrEAAAAIi-_QiwoRSc9_bAC9cmuNXTQyU8ajJmGtKdhskQ" />
 
     <provider android:name="com.google.android.apps.mytracks.content.MyTracksProvider"
-              android:multiprocess="true"
+              android:process=":trackrecord"
               android:authorities="com.google.android.maps.mytracks" />
 
     <activity android:name="com.google.android.apps.mytracks.MyTracks"
@@ -101,6 +101,9 @@
   <uses-permission android:name="com.google.android.googleapps.permission.GOOGLE_AUTH.writely" />
   <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
 
+  <!-- Permissions for misc services -->
+  <uses-permission android:name="android.permission.READ_PHONE_STATE" />
+
   <uses-sdk android:minSdkVersion="3"/>
   <supports-screens
           android:largeScreens="true"
diff --git a/MyTracks/src/com/google/android/apps/mytracks/services/StatusAnnouncerTask.java b/MyTracks/src/com/google/android/apps/mytracks/services/StatusAnnouncerTask.java
index 158a978ae..4113cdc59 100644
--- a/MyTracks/src/com/google/android/apps/mytracks/services/StatusAnnouncerTask.java
+++ b/MyTracks/src/com/google/android/apps/mytracks/services/StatusAnnouncerTask.java
@@ -27,6 +27,8 @@ import android.content.Context;
 import android.content.SharedPreferences;
 import android.speech.tts.TextToSpeech;
 import android.speech.tts.TextToSpeech.OnInitListener;
+import android.telephony.PhoneStateListener;
+import android.telephony.TelephonyManager;
 import android.util.Log;
 
 import java.util.Locale;
@@ -63,6 +65,26 @@ public class StatusAnnouncerTask implements PeriodicTask {
    */
   private boolean ready = false;
 
+  /**
+   * Whether we're allowed to speak right now.
+   */
+  private boolean speechAllowed;
+
+  /**
+   * Listener which updates {@link #speechAllowed} when the phone state changes.
+   */
+  private final PhoneStateListener phoneListener = new PhoneStateListener() {
+    @Override
+    public void onCallStateChanged(int state, String incomingNumber) {
+      speechAllowed  = (state == TelephonyManager.CALL_STATE_IDLE);
+
+      if (!speechAllowed && tts.isSpeaking()) {
+        // Stop speaking if we are
+        tts.stop();
+      }
+    }
+  };
+
   /**
    * Constructs the announcer and start the TTS engine.
    */
@@ -116,6 +138,12 @@ public class StatusAnnouncerTask implements PeriodicTask {
       return;
     }
 
+    if (!speechAllowed) {
+      Log.i(MyTracksConstants.TAG,
+          "Not making announcement - not allowed at this time");
+      return;
+    }
+
     if (service == null || service.getTripStatistics() == null) {
       Log.e(MyTracksConstants.TAG, "StatusAnnouncer stats not initialized.");
       return;
@@ -193,12 +221,23 @@ public class StatusAnnouncerTask implements PeriodicTask {
         context.getString(speedLabel));
   }
 
-  public void shutdown() {
-    tts.shutdown();
+  @Override
+  public void start() {
+    // Register ourselves as a listener so we won't speak during a call.
+    speechAllowed = true;
+    TelephonyManager telephony =
+        (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
+    telephony.listen(phoneListener, PhoneStateListener.LISTEN_CALL_STATE);
   }
 
   @Override
-  public void start() {
+  public void shutdown() {
+    // Stop listening to phone state
+    TelephonyManager telephony =
+        (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
+    telephony.listen(phoneListener, PhoneStateListener.LISTEN_NONE);
+
+    tts.shutdown();
   }
 
   public static int getVolumeStream() {