diff --git a/src/com/android/settings/wifi/calling/WifiCallingSettingsForSub.java b/src/com/android/settings/wifi/calling/WifiCallingSettingsForSub.java
index 00f4758..c0cb4fc 100644
--- a/src/com/android/settings/wifi/calling/WifiCallingSettingsForSub.java
+++ b/src/com/android/settings/wifi/calling/WifiCallingSettingsForSub.java
@@ -33,6 +33,7 @@
 import android.telephony.PhoneStateListener;
 import android.telephony.SubscriptionManager;
 import android.telephony.TelephonyManager;
+import android.telephony.ims.ProvisioningManager;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.LayoutInflater;
@@ -42,7 +43,9 @@
 import android.widget.TextView;
 
 import com.android.ims.ImsConfig;
+import com.android.ims.ImsException;
 import com.android.ims.ImsManager;
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.internal.telephony.Phone;
 import com.android.settings.R;
@@ -150,6 +153,19 @@
                 }
             };
 
+    private final ProvisioningManager.Callback mProvisioningCallback =
+            new ProvisioningManager.Callback() {
+                @Override
+                public void onProvisioningIntChanged(int item, int value) {
+                    if (item == ImsConfig.ConfigConstants.VOICE_OVER_WIFI_SETTING_ENABLED
+                            || item == ImsConfig.ConfigConstants.VLT_SETTING_ENABLED) {
+                        // The provisioning policy might have changed. Update the body to make sure
+                        // this change takes effect if needed.
+                        updateBody();
+                    }
+                }
+            };
+
     @Override
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
@@ -219,6 +235,11 @@
         return 0;
     }
 
+    @VisibleForTesting
+    ImsManager getImsManager() {
+        return ImsManager.getInstance(getActivity(), SubscriptionManager.getPhoneId(mSubId));
+    }
+
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -234,8 +255,7 @@
                     FRAGMENT_BUNDLE_SUBID, SubscriptionManager.INVALID_SUBSCRIPTION_ID);
         }
 
-        mImsManager = ImsManager.getInstance(
-                getActivity(), SubscriptionManager.getPhoneId(mSubId));
+        mImsManager = getImsManager();
 
         mButtonWfcMode = (ListPreference) findPreference(BUTTON_WFC_MODE);
         mButtonWfcMode.setOnPreferenceChangeListener(this);
@@ -272,6 +292,13 @@
     }
 
     private void updateBody() {
+        if (!mImsManager.isWfcProvisionedOnDevice()) {
+            // This screen is not allowed to be shown due to provisioning policy and should
+            // therefore be closed.
+            finish();
+            return;
+        }
+
         CarrierConfigManager configManager = (CarrierConfigManager)
                 getSystemService(Context.CARRIER_CONFIG_SERVICE);
         boolean isWifiOnlySupported = true;
@@ -333,6 +360,14 @@
         if (intent.getBooleanExtra(Phone.EXTRA_KEY_ALERT_SHOW, false)) {
             showAlert(intent);
         }
+
+        // Register callback for provisioning changes.
+        try {
+            mImsManager.getConfigInterface().addConfigCallback(mProvisioningCallback);
+        } catch (ImsException e) {
+            Log.w(TAG, "onResume: Unable to register callback for provisioning changes.");
+        }
+
     }
 
     @Override
@@ -351,6 +386,15 @@
         }
 
         context.unregisterReceiver(mIntentReceiver);
+
+        // Remove callback for provisioning changes.
+        try {
+            mImsManager.getConfigInterface().removeConfigCallback(
+                    mProvisioningCallback.getBinder());
+        } catch (ImsException e) {
+            Log.w(TAG, "onPause: Unable to remove callback for provisioning changes");
+        }
+
     }
 
     /**
diff --git a/tests/robotests/src/com/android/settings/wifi/calling/WifiCallingSettingsForSubTest.java b/tests/robotests/src/com/android/settings/wifi/calling/WifiCallingSettingsForSubTest.java
index d60f8cf..a5e80c6 100644
--- a/tests/robotests/src/com/android/settings/wifi/calling/WifiCallingSettingsForSubTest.java
+++ b/tests/robotests/src/com/android/settings/wifi/calling/WifiCallingSettingsForSubTest.java
@@ -18,17 +18,135 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
-import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyInt;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
 
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.telephony.ims.ProvisioningManager;
+import android.view.View;
+import android.widget.TextView;
+
+import androidx.preference.ListPreference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.ims.ImsConfig;
+import com.android.ims.ImsException;
+import com.android.ims.ImsManager;
+import com.android.settings.R;
+import com.android.settings.SettingsActivity;
+import com.android.settings.testutils.FakeFeatureFactory;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.testutils.shadow.SettingsShadowResources;
+import com.android.settings.widget.SwitchBar;
+import com.android.settings.widget.ToggleSwitch;
+
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+import org.robolectric.util.ReflectionHelpers;
 
 @RunWith(SettingsRobolectricTestRunner.class)
+@Config(shadows = SettingsShadowResources.SettingsShadowTheme.class)
 public class WifiCallingSettingsForSubTest {
+    private TestFragment mFragment;
+    private Context mContext;
+    private TextView mEmptyView;
+
+    @Mock private ImsManager mImsManager;
+    @Mock private PreferenceScreen mPreferenceScreen;
+    @Mock private SettingsActivity mActivity;
+    @Mock private SwitchBar mSwitchBar;
+    @Mock private ToggleSwitch mToggleSwitch;
+    @Mock private View mView;
+    @Mock private ImsConfig mImsConfig;
+
+    @Before
+    public void setUp() throws NoSuchFieldException, ImsException {
+        MockitoAnnotations.initMocks(this);
+        FakeFeatureFactory.setupForTest();
+
+        mContext = RuntimeEnvironment.application;
+        doReturn(mContext.getTheme()).when(mActivity).getTheme();
+
+        mFragment = spy(new TestFragment());
+        doReturn(mActivity).when(mFragment).getActivity();
+        doReturn(mock(Intent.class)).when(mActivity).getIntent();
+        doReturn(mContext.getResources()).when(mFragment).getResources();
+        doReturn(mPreferenceScreen).when(mFragment).getPreferenceScreen();
+        final Bundle bundle = new Bundle();
+        when(mFragment.getArguments()).thenReturn(bundle);
+        doNothing().when(mFragment).addPreferencesFromResource(anyInt());
+        doReturn(mock(ListPreference.class)).when(mFragment).findPreference(any());
+        doNothing().when(mFragment).finish();
+        doReturn(mView).when(mFragment).getView();
+
+        mEmptyView = new TextView(mContext);
+        doReturn(mEmptyView).when(mView).findViewById(android.R.id.empty);
+
+        ReflectionHelpers.setField(mSwitchBar, "mSwitch", mToggleSwitch);
+        doReturn(mSwitchBar).when(mView).findViewById(R.id.switch_bar);
+
+        doReturn(mImsManager).when(mFragment).getImsManager();
+        doReturn(mImsConfig).when(mImsManager).getConfigInterface();
+        doReturn(true).when(mImsManager).isWfcProvisionedOnDevice();
+
+        mFragment.onAttach(mContext);
+        mFragment.onCreate(null);
+        mFragment.onActivityCreated(null);
+    }
 
     @Test
     public void getHelpResource_shouldReturn0() {
-        assertThat(new WifiCallingSettingsForSub().getHelpResource())
-                .isEqualTo(0);
+        assertThat(mFragment.getHelpResource()).isEqualTo(0);
+    }
+
+    @Test
+    public void onResume_provisioningAllowed_shouldNotFinish() throws ImsException {
+        // Call onResume while provisioning is allowed.
+        mFragment.onResume();
+
+        // Verify that finish() is not called.
+        verify(mFragment, never()).finish();
+    }
+
+    @Test
+    public void onResume_provisioningDisallowed_shouldFinish() {
+        // Call onResume while provisioning is disallowed.
+        doReturn(false).when(mImsManager).isWfcProvisionedOnDevice();
+        mFragment.onResume();
+
+        // Verify that finish() is called
+        verify(mFragment).finish();
+    }
+
+    @Test
+    public void onResumeOnPause_provisioningCallbackRegistration() throws ImsException {
+        // Verify that provisioning callback is registered after call to onResume().
+        mFragment.onResume();
+        verify(mImsConfig).addConfigCallback(any(ProvisioningManager.Callback.class));
+
+        // Verify that provisioning callback is unregistered after call to onPause.
+        mFragment.onPause();
+        verify(mImsConfig).removeConfigCallback(any());
+    }
+
+    protected static class TestFragment extends WifiCallingSettingsForSub {
+        @Override
+        protected Object getSystemService(final String name) {
+            return null;
+        }
     }
 }