diff --git a/src/com/android/phone/PhoneInterfaceManager.java b/src/com/android/phone/PhoneInterfaceManager.java
index b03d6f3..8d946f5 100755
--- a/src/com/android/phone/PhoneInterfaceManager.java
+++ b/src/com/android/phone/PhoneInterfaceManager.java
@@ -134,6 +134,7 @@
 import com.android.ims.ImsManager;
 import com.android.ims.internal.IImsServiceFeatureCallback;
 import com.android.ims.rcs.uce.eab.EabUtil;
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.telephony.CallForwardInfo;
 import com.android.internal.telephony.CallManager;
 import com.android.internal.telephony.CallStateException;
@@ -7303,13 +7304,7 @@
                         getDefaultDataEnabled());
                 setNetworkSelectionModeAutomatic(subId);
                 Phone phone = getPhone(subId);
-                if (phone != null) {
-                    SubscriptionManager.setSubscriptionProperty(subId,
-                            SubscriptionManager.ALLOWED_NETWORK_TYPES,
-                            "user=" + RadioAccessFamily.getRafFromNetworkType(
-                                    RILConstants.PREFERRED_NETWORK_MODE));
-                    phone.loadAllowedNetworksFromSubscriptionDatabase();
-                }
+                cleanUpAllowedNetworkTypes(phone, subId);
                 setDataRoamingEnabled(subId, getDefaultDataRoamingEnabled(subId));
                 CarrierInfoManager.deleteAllCarrierKeysForImsiEncryption(mApp);
             }
@@ -7335,6 +7330,21 @@
         }
     }
 
+    @VisibleForTesting
+    void cleanUpAllowedNetworkTypes(Phone phone, int subId) {
+        if (phone == null || !SubscriptionManager.isUsableSubscriptionId(subId)) {
+            return;
+        }
+        long defaultNetworkType = RadioAccessFamily.getRafFromNetworkType(
+                RILConstants.PREFERRED_NETWORK_MODE);
+        SubscriptionManager.setSubscriptionProperty(subId,
+                SubscriptionManager.ALLOWED_NETWORK_TYPES,
+                "user=" + defaultNetworkType);
+        phone.loadAllowedNetworksFromSubscriptionDatabase();
+        phone.setAllowedNetworkTypes(TelephonyManager.ALLOWED_NETWORK_TYPES_REASON_USER,
+                defaultNetworkType, null);
+    }
+
     private void cleanUpSmsRawTable(Context context) {
         ContentResolver resolver = context.getContentResolver();
         Uri uri = Uri.withAppendedPath(Telephony.Sms.CONTENT_URI, "raw/permanentDelete");
diff --git a/tests/src/com/android/phone/PhoneInterfaceManagerTest.java b/tests/src/com/android/phone/PhoneInterfaceManagerTest.java
new file mode 100644
index 0000000..fe5d013
--- /dev/null
+++ b/tests/src/com/android/phone/PhoneInterfaceManagerTest.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+
+package com.android.phone;
+
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+
+import android.content.pm.PackageManager;
+import android.telephony.RadioAccessFamily;
+import android.telephony.TelephonyManager;
+
+import androidx.test.annotation.UiThreadTest;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import com.android.TelephonyTestBase;
+import com.android.internal.telephony.Phone;
+import com.android.internal.telephony.RILConstants;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+
+/**
+ * Unit Test for CarrierConfigLoader.
+ */
+@RunWith(AndroidJUnit4.class)
+public class PhoneInterfaceManagerTest extends TelephonyTestBase {
+    private PhoneInterfaceManager mPhoneInterfaceManager;
+
+    @Mock
+    PhoneGlobals mPhoneGlobals;
+    @Mock
+    Phone mPhone;
+    @Mock
+    PackageManager mPackageManager;
+
+    @Before
+    @UiThreadTest
+    public void setUp() throws Exception {
+        super.setUp();
+        doReturn(mPackageManager).when(mPhoneGlobals).getPackageManager();
+        doReturn(false).when(mPackageManager).hasSystemFeature(
+                PackageManager.FEATURE_TELEPHONY_IMS);
+        mPhoneInterfaceManager = PhoneInterfaceManager.init(mPhoneGlobals);
+    }
+
+    @Test
+    public void cleanUpAllowedNetworkTypes_validPhoneAndSubId_doSetAllowedNetwork() {
+        long defaultNetworkType = RadioAccessFamily.getRafFromNetworkType(
+                RILConstants.PREFERRED_NETWORK_MODE);
+
+        mPhoneInterfaceManager.cleanUpAllowedNetworkTypes(mPhone, 1);
+
+        verify(mPhone).loadAllowedNetworksFromSubscriptionDatabase();
+        verify(mPhone).setAllowedNetworkTypes(TelephonyManager.ALLOWED_NETWORK_TYPES_REASON_USER,
+                defaultNetworkType, null);
+    }
+
+    @Test
+    public void cleanUpAllowedNetworkTypes_validPhoneAndInvalidSubId_doNotSetAllowedNetwork() {
+        long defaultNetworkType = RadioAccessFamily.getRafFromNetworkType(
+                RILConstants.PREFERRED_NETWORK_MODE);
+
+        mPhoneInterfaceManager.cleanUpAllowedNetworkTypes(mPhone, -1);
+
+        verify(mPhone, never()).loadAllowedNetworksFromSubscriptionDatabase();
+        verify(mPhone, never()).setAllowedNetworkTypes(
+                TelephonyManager.ALLOWED_NETWORK_TYPES_REASON_USER, defaultNetworkType, null);
+    }
+}