diff --git a/src/com/android/phone/CarrierConfigLoader.java b/src/com/android/phone/CarrierConfigLoader.java
index 5ba148d..9d11dfc 100644
--- a/src/com/android/phone/CarrierConfigLoader.java
+++ b/src/com/android/phone/CarrierConfigLoader.java
@@ -62,6 +62,7 @@
 import com.android.internal.telephony.ICarrierConfigLoader;
 import com.android.internal.telephony.IccCardConstants;
 import com.android.internal.telephony.Phone;
+import com.android.internal.telephony.PhoneConfigurationManager;
 import com.android.internal.telephony.PhoneFactory;
 import com.android.internal.telephony.SubscriptionInfoUpdater;
 import com.android.internal.telephony.TelephonyPermissions;
@@ -128,7 +129,7 @@
 
     // SubscriptionInfoUpdater
     @NonNull private final SubscriptionInfoUpdater mSubscriptionInfoUpdater;
-    // Broadcast receiver for system events (BootCompleted, MultiSimConfigChanged etc.)
+    // Broadcast receiver for system events
     @NonNull
     private final BroadcastReceiver mSystemBroadcastReceiver = new ConfigLoaderBroadcastReceiver();
     @NonNull private final LocalLog mCarrierConfigLoadingLog = new LocalLog(100);
@@ -706,7 +707,6 @@
 
         IntentFilter systemEventsFilter = new IntentFilter();
         systemEventsFilter.addAction(Intent.ACTION_BOOT_COMPLETED);
-        systemEventsFilter.addAction(TelephonyManager.ACTION_MULTI_SIM_CONFIG_CHANGED);
         context.registerReceiver(mSystemBroadcastReceiver, systemEventsFilter);
 
         mNumPhones = TelephonyManager.from(context).getActiveModemCount();
@@ -729,6 +729,10 @@
         }
         logd("CarrierConfigLoader has started");
         mSubscriptionInfoUpdater = subscriptionInfoUpdater;
+
+        PhoneConfigurationManager.registerForMultiSimConfigChange(
+                mHandler, EVENT_MULTI_SIM_CONFIG_CHANGED, null);
+
         mHandler.sendEmptyMessage(EVENT_CHECK_SYSTEM_UPDATE);
     }
 
@@ -763,6 +767,11 @@
             }
         }
 
+        if (mConfigFromDefaultApp.length <= phoneId) {
+            Log.wtf(LOG_TAG, "Invalid phone id " + phoneId);
+            return;
+        }
+
         mConfigFromDefaultApp[phoneId] = null;
         mConfigFromCarrierApp[phoneId] = null;
         mServiceConnection[phoneId] = null;
@@ -1824,10 +1833,6 @@
                 case Intent.ACTION_BOOT_COMPLETED:
                     mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_UNLOCKED, null));
                     break;
-
-                case TelephonyManager.ACTION_MULTI_SIM_CONFIG_CHANGED:
-                    mHandler.sendEmptyMessage(EVENT_MULTI_SIM_CONFIG_CHANGED);
-                    break;
             }
         }
     }
diff --git a/tests/src/com/android/phone/CarrierConfigLoaderTest.java b/tests/src/com/android/phone/CarrierConfigLoaderTest.java
index 45a53f7..f29c123 100644
--- a/tests/src/com/android/phone/CarrierConfigLoaderTest.java
+++ b/tests/src/com/android/phone/CarrierConfigLoaderTest.java
@@ -32,6 +32,7 @@
 
 import android.content.Context;
 import android.content.Intent;
+import android.content.ServiceConnection;
 import android.content.SharedPreferences;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
@@ -65,6 +66,7 @@
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.Mockito;
+import org.mockito.MockitoAnnotations;
 
 import java.io.FileDescriptor;
 import java.io.PrintWriter;
@@ -102,7 +104,7 @@
     @Before
     public void setUp() throws Exception {
         super.setUp();
-
+        MockitoAnnotations.initMocks(this);
         replaceInstance(SubscriptionManagerService.class, "sInstance", null,
                 mSubscriptionManagerService);
 
@@ -428,4 +430,21 @@
                 : TelephonyManager.CARRIER_PRIVILEGE_STATUS_NO_ACCESS).when(
                 mockTelephonyManager).getCarrierPrivilegeStatus(anyInt());
     }
+
+    @Test
+    public void testMultiSimConfigChanged() throws Exception {
+        replaceInstance(TelephonyManager.class, "sInstance", null, mTelephonyManager);
+        mContext.grantPermission(STUB_PERMISSION_ENABLE_ALL);
+
+        // Changed from 1 to 2.
+        doReturn(2).when(mTelephonyManager).getActiveModemCount();
+        doReturn(true).when(mContext).bindService(
+                any(Intent.class), any(ServiceConnection.class), anyInt());
+        doNothing().when(mContext).sendBroadcastAsUser(any(Intent.class), any(UserHandle.class));
+        mHandler.sendMessage(mHandler.obtainMessage(17 /* EVENT_MULTI_SIM_CONFIG_CHANGED */));
+        mTestableLooper.processAllMessages();
+
+        mCarrierConfigLoader.updateConfigForPhoneId(1, IccCardConstants.INTENT_VALUE_ICC_ABSENT);
+        mTestableLooper.processAllMessages();
+    }
 }