diff --git a/src/com/android/server/telecom/InCallController.java b/src/com/android/server/telecom/InCallController.java
index 797a442..f3a030e 100644
--- a/src/com/android/server/telecom/InCallController.java
+++ b/src/com/android/server/telecom/InCallController.java
@@ -261,8 +261,6 @@
 
         public InCallServiceBindingConnection(InCallServiceInfo info) {
             mInCallServiceInfo = info;
-            mNotificationManager =
-                    (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
         }
 
         @Override
@@ -325,19 +323,7 @@
                 mContext.unbindService(mServiceConnection);
                 mIsConnected = false;
                 if (mIsNullBinding) {
-                    Notification.Builder builder = new Notification.Builder(mContext,
-                            NotificationChannelManager.CHANNEL_ID_IN_CALL_SERVICE_CRASH);
-                    builder.setSmallIcon(R.drawable.ic_phone)
-                            .setColor(mContext.getResources().getColor(R.color.theme_color))
-                            .setContentTitle(
-                                    mContext.getText(
-                                            R.string.notification_crashedInCallService_title))
-                            .setStyle(new Notification.BigTextStyle()
-                                    .bigText(mContext.getString(
-                                            R.string.notification_crashedInCallService_body,
-                                            packageName)));
-                    mNotificationManager.notify(NOTIFICATION_TAG, IN_CALL_SERVICE_NOTIFICATION_ID,
-                            builder.build());
+                    sendCrashedInCallServiceNotification(packageName);
                 }
                 if (mCall != null) {
                     mCall.getAnalytics().addInCallService(
@@ -1328,7 +1314,13 @@
                 mCallsManager.getCurrentUserHandle().getIdentifier());
         Log.d(this, "Default Dialer package: " + packageName);
 
-        return getInCallServiceComponent(packageName, IN_CALL_SERVICE_TYPE_DIALER_UI);
+        InCallServiceInfo defaultDialerComponent = getInCallServiceComponent(packageName,
+                IN_CALL_SERVICE_TYPE_DIALER_UI);
+        if (packageName != null && defaultDialerComponent == null) {
+            // The in call service of default phone app is disabled, send notification.
+            sendCrashedInCallServiceNotification(packageName);
+        }
+        return defaultDialerComponent;
     }
 
     private InCallServiceInfo getCurrentCarModeComponent() {
@@ -1807,4 +1799,22 @@
             }
         }
     }
+
+    private void sendCrashedInCallServiceNotification(String packageName) {
+        NotificationManager notificationManager = (NotificationManager) mContext
+                .getSystemService(Context.NOTIFICATION_SERVICE);
+        Notification.Builder builder = new Notification.Builder(mContext,
+                NotificationChannelManager.CHANNEL_ID_IN_CALL_SERVICE_CRASH);
+        builder.setSmallIcon(R.drawable.ic_phone)
+                .setColor(mContext.getResources().getColor(R.color.theme_color))
+                .setContentTitle(
+                        mContext.getText(
+                                R.string.notification_crashedInCallService_title))
+                .setStyle(new Notification.BigTextStyle()
+                        .bigText(mContext.getString(
+                                R.string.notification_crashedInCallService_body,
+                                packageName)));
+        notificationManager.notify(NOTIFICATION_TAG, IN_CALL_SERVICE_NOTIFICATION_ID,
+                builder.build());
+    }
 }
diff --git a/testapps/res/layout/incall_screen.xml b/testapps/res/layout/incall_screen.xml
index 414bdb8..f8f919b 100644
--- a/testapps/res/layout/incall_screen.xml
+++ b/testapps/res/layout/incall_screen.xml
@@ -131,4 +131,14 @@
             android:layout_height="wrap_content"
             android:layout_marginLeft="10dp"/>
     </LinearLayout>
+    <Button
+        android:id="@+id/disable_incallservice"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Disable InCallService" />
+    <Button
+        android:id="@+id/enable_incallservice"
+        android:layout_height="wrap_content"
+        android:layout_width="wrap_content"
+        android:text="Enable InCallService" />
 </LinearLayout>
diff --git a/testapps/src/com/android/server/telecom/testapps/TestInCallServiceImpl.java b/testapps/src/com/android/server/telecom/testapps/TestInCallServiceImpl.java
index fb15e1d..094f0a5 100644
--- a/testapps/src/com/android/server/telecom/testapps/TestInCallServiceImpl.java
+++ b/testapps/src/com/android/server/telecom/testapps/TestInCallServiceImpl.java
@@ -23,9 +23,6 @@
 import android.telecom.Phone;
 import android.util.Log;
 
-import java.lang.Override;
-import java.lang.String;
-
 /**
  * Test In-Call service implementation.  Logs incoming events.  Mainly used to test binding to
  * multiple {@link InCallService} implementations.
diff --git a/testapps/src/com/android/server/telecom/testapps/TestInCallUI.java b/testapps/src/com/android/server/telecom/testapps/TestInCallUI.java
index edcbba1..3f3a2c8 100644
--- a/testapps/src/com/android/server/telecom/testapps/TestInCallUI.java
+++ b/testapps/src/com/android/server/telecom/testapps/TestInCallUI.java
@@ -20,6 +20,7 @@
 import android.bluetooth.BluetoothDevice;
 import android.content.ComponentName;
 import android.content.Intent;
+import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.telecom.Call;
 import android.telecom.CallAudioState;
@@ -233,6 +234,20 @@
             Call call = mCallList.getCall(0);
             call.reject(false, null);
         });
+
+        findViewById(R.id.disable_incallservice).setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                disableInCallService();
+            }
+        });
+
+        findViewById(R.id.enable_incallservice).setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                enableInCallService();
+            }
+        });
     }
 
     public void updateCallAudioState(CallAudioState cas) {
@@ -285,4 +300,26 @@
                 SelfManagedCallList.class.getPackage().getName(),
                 SelfManagedConnectionService.class.getName()), "1");
     }
+
+    public void disableInCallService() {
+        ComponentName uiComponent = new ComponentName(
+                TestInCallServiceImpl.class.getPackage().getName(),
+                TestInCallServiceImpl.class.getName());
+        getPackageManager().setComponentEnabledSetting(uiComponent,
+                PackageManager.COMPONENT_ENABLED_STATE_DISABLED, 0);
+        boolean isEnabled = getPackageManager().getComponentEnabledSetting(uiComponent)
+                == PackageManager.COMPONENT_ENABLED_STATE_ENABLED;
+        Toast.makeText(this, "Is UI enabled? " + isEnabled, Toast.LENGTH_LONG).show();
+    }
+
+    public void enableInCallService() {
+        ComponentName uiComponent = new ComponentName(
+                TestInCallServiceImpl.class.getPackage().getName(),
+                TestInCallServiceImpl.class.getName());
+        getPackageManager().setComponentEnabledSetting(uiComponent,
+                PackageManager.COMPONENT_ENABLED_STATE_ENABLED, 0);
+        boolean isEnabled = getPackageManager().getComponentEnabledSetting(uiComponent)
+                == PackageManager.COMPONENT_ENABLED_STATE_ENABLED;
+        Toast.makeText(this, "Is UI enabled? " + isEnabled, Toast.LENGTH_LONG).show();
+    }
 }