diff --git a/java/com/android/incallui/InCallPresenter.java b/java/com/android/incallui/InCallPresenter.java
index ae25f4d..f0d3adc 100644
--- a/java/com/android/incallui/InCallPresenter.java
+++ b/java/com/android/incallui/InCallPresenter.java
@@ -260,6 +260,8 @@
   private VideoSurfaceTexture localVideoSurfaceTexture;
   private VideoSurfaceTexture remoteVideoSurfaceTexture;
 
+  private MotorolaInCallUiNotifier motorolaInCallUiNotifier;
+
   /** Inaccessible constructor. Must use getRunningInstance() to get this singleton. */
   @VisibleForTesting
   InCallPresenter() {}
@@ -382,6 +384,15 @@
 
     AudioModeProvider.getInstance().addListener(this);
 
+    if (motorolaInCallUiNotifier == null) {
+      // Add listener to notify Telephony process when the incoming call screen is started or
+      // finished. This is for hiding USSD dialog because the incoming call screen should have
+      // higher precedence over this dialog.
+      motorolaInCallUiNotifier = new MotorolaInCallUiNotifier(context);
+      addInCallUiListener(motorolaInCallUiNotifier);
+      addListener(motorolaInCallUiNotifier);
+    }
+
     LogUtil.d("InCallPresenter.setUp", "Finished InCallPresenter.setUp");
     Trace.endSection();
   }
diff --git a/java/com/android/incallui/MotorolaInCallUiNotifier.java b/java/com/android/incallui/MotorolaInCallUiNotifier.java
new file mode 100644
index 0000000..c3c7339
--- /dev/null
+++ b/java/com/android/incallui/MotorolaInCallUiNotifier.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * This file is derived in part from code issued under the following license.
+ *
+ * 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.
+ *
+ */
+package com.android.incallui;
+
+import android.content.Context;
+import android.content.Intent;
+import android.support.annotation.VisibleForTesting;
+import com.android.dialer.common.LogUtil;
+import com.android.incallui.InCallPresenter.InCallState;
+import com.android.incallui.InCallPresenter.InCallStateListener;
+import com.android.incallui.InCallPresenter.InCallUiListener;
+import com.android.incallui.call.CallList;
+
+/**
+ * Responsible for broadcasting the Intent INCOMING_CALL_VISIBILITY_CHANGED so other processes could
+ * know when the incoming call activity is started or finished.
+ */
+public class MotorolaInCallUiNotifier implements InCallUiListener, InCallStateListener {
+
+  @VisibleForTesting static final String EXTRA_VISIBLE_KEY = "visible";
+
+  @VisibleForTesting
+  static final String ACTION_INCOMING_CALL_VISIBILITY_CHANGED =
+      "com.motorola.incallui.action.INCOMING_CALL_VISIBILITY_CHANGED";
+
+  @VisibleForTesting
+  static final String PERMISSION_INCOMING_CALL_VISIBILITY_CHANGED =
+      "com.motorola.incallui.permission.INCOMING_CALL_VISIBILITY_CHANGED";
+
+  private final Context context;
+
+  MotorolaInCallUiNotifier(Context context) {
+    this.context = context;
+  }
+
+  @Override
+  public void onUiShowing(boolean showing) {
+    if (showing && CallList.getInstance().getIncomingCall() != null) {
+      sendInCallUiBroadcast(true);
+    }
+  }
+
+  @Override
+  public void onStateChange(InCallState oldState, InCallState newState, CallList callList) {
+    if (oldState != null
+        && oldState.isConnectingOrConnected()
+        && newState == InCallState.NO_CALLS) {
+      sendInCallUiBroadcast(false);
+    }
+  }
+
+  private void sendInCallUiBroadcast(boolean visible) {
+    LogUtil.d(
+        "MotorolaInCallUiNotifier.sendInCallUiBroadcast",
+        "Send InCallUi Broadcast, visible: " + visible);
+    Intent intent = new Intent();
+    intent.putExtra(EXTRA_VISIBLE_KEY, visible);
+    intent.setAction(ACTION_INCOMING_CALL_VISIBILITY_CHANGED);
+    context.sendBroadcast(intent, PERMISSION_INCOMING_CALL_VISIBILITY_CHANGED);
+  }
+}