diff --git a/res/xml/mobile_network_settings_v2.xml b/res/xml/mobile_network_settings_v2.xml
index 1ff886078c5..20ed1c75a22 100644
--- a/res/xml/mobile_network_settings_v2.xml
+++ b/res/xml/mobile_network_settings_v2.xml
@@ -85,6 +85,12 @@
             android:summary="@string/mms_message_summary"
             settings:controller="com.android.settings.network.telephony.MmsMessagePreferenceController"/>
 
+        <SwitchPreference
+            android:key="data_during_calls"
+            android:title="@string/data_during_calls_title"
+            android:summary="@string/data_during_calls_summary"
+            settings:controller="com.android.settings.network.telephony.DataDuringCallsPreferenceController"/>
+
         <SwitchPreference
             android:key="enhanced_4g_lte"
             android:title="@string/enhanced_4g_lte_mode_title"
diff --git a/src/com/android/settings/network/telephony/DataDuringCallsPreferenceController.java b/src/com/android/settings/network/telephony/DataDuringCallsPreferenceController.java
new file mode 100644
index 00000000000..6f61d915b91
--- /dev/null
+++ b/src/com/android/settings/network/telephony/DataDuringCallsPreferenceController.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2019 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.settings.network.telephony;
+
+import static androidx.lifecycle.Lifecycle.Event.ON_PAUSE;
+import static androidx.lifecycle.Lifecycle.Event.ON_RESUME;
+
+import android.content.Context;
+import android.telephony.SubscriptionManager;
+import android.telephony.TelephonyManager;
+
+import androidx.lifecycle.Lifecycle;
+import androidx.lifecycle.LifecycleObserver;
+import androidx.lifecycle.OnLifecycleEvent;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.network.SubscriptionsChangeListener;
+
+public class DataDuringCallsPreferenceController extends TelephonyTogglePreferenceController
+        implements LifecycleObserver,
+        SubscriptionsChangeListener.SubscriptionsChangeListenerClient {
+
+    private SwitchPreference mPreference;
+    private SubscriptionsChangeListener mChangeListener;
+    private TelephonyManager mManager;
+
+    public DataDuringCallsPreferenceController(Context context,
+            String preferenceKey) {
+        super(context, preferenceKey);
+        mChangeListener = new SubscriptionsChangeListener(mContext, this);
+    }
+
+    public void init(Lifecycle lifecycle, int subId) {
+        this.mSubId = subId;
+        mManager = mContext.getSystemService(TelephonyManager.class).createForSubscriptionId(subId);
+        lifecycle.addObserver(this);
+    }
+
+    @OnLifecycleEvent(ON_RESUME)
+    public void onResume() {
+        mChangeListener.start();
+    }
+
+    @OnLifecycleEvent(ON_PAUSE)
+    public void onPause() {
+        mChangeListener.stop();
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public boolean isChecked() {
+        return mManager.isDataAllowedInVoiceCall();
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        mManager.setDataAllowedDuringVoiceCall(isChecked);
+        return true;
+    }
+
+    @Override
+    public int getAvailabilityStatus(int subId) {
+        if (mSubId == SubscriptionManager.INVALID_SUBSCRIPTION_ID ||
+                SubscriptionManager.getDefaultDataSubscriptionId() == mSubId) {
+            return CONDITIONALLY_UNAVAILABLE;
+        }
+        return AVAILABLE;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        preference.setVisible(isAvailable());
+    }
+
+    @Override
+    public void onAirplaneModeChanged(boolean airplaneModeEnabled) {}
+
+    @Override
+    public void onSubscriptionsChanged() {
+        updateState(mPreference);
+    }
+}
diff --git a/src/com/android/settings/network/telephony/MobileNetworkSettings.java b/src/com/android/settings/network/telephony/MobileNetworkSettings.java
index 838aa12f95f..aa63b747ad9 100644
--- a/src/com/android/settings/network/telephony/MobileNetworkSettings.java
+++ b/src/com/android/settings/network/telephony/MobileNetworkSettings.java
@@ -138,6 +138,7 @@ public class MobileNetworkSettings extends RestrictedDashboardFragment {
             use(CarrierSettingsVersionPreferenceController.class).init(mSubId);
             use(BillingCyclePreferenceController.class).init(mSubId);
             use(MmsMessagePreferenceController.class).init(mSubId);
+            use(DataDuringCallsPreferenceController.class).init(getLifecycle(), mSubId);
             use(DisabledSubscriptionController.class).init(getLifecycle(), mSubId);
             use(DeleteSimProfilePreferenceController.class).init(mSubId, this,
                     REQUEST_CODE_DELETE_SUBSCRIPTION);
diff --git a/tests/robotests/assets/grandfather_slice_controller_not_in_xml b/tests/robotests/assets/grandfather_slice_controller_not_in_xml
index 328c7bc35c7..fd1cef2469c 100644
--- a/tests/robotests/assets/grandfather_slice_controller_not_in_xml
+++ b/tests/robotests/assets/grandfather_slice_controller_not_in_xml
@@ -4,3 +4,4 @@ com.android.settings.testutils.FakeInvalidSliderController
 com.android.settings.core.TogglePreferenceControllerTest$FakeToggle
 com.android.settings.accessibility.AccessibilitySlicePreferenceController
 com.android.settings.network.telephony.MmsMessagePreferenceController
+com.android.settings.network.telephony.DataDuringCallsPreferenceController
diff --git a/tests/robotests/src/com/android/settings/network/DataDuringCallsPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/network/DataDuringCallsPreferenceControllerTest.java
new file mode 100644
index 00000000000..a42420cc895
--- /dev/null
+++ b/tests/robotests/src/com/android/settings/network/DataDuringCallsPreferenceControllerTest.java
@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2019 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.settings.network;
+
+import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;
+
+import static com.android.settings.core.BasePreferenceController.CONDITIONALLY_UNAVAILABLE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.telephony.TelephonyManager;
+
+import androidx.lifecycle.Lifecycle;
+import androidx.preference.PreferenceScreen;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.network.telephony.DataDuringCallsPreferenceController;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+import org.robolectric.shadows.ShadowSubscriptionManager;
+
+@RunWith(RobolectricTestRunner.class)
+@Config(shadows = ShadowSubscriptionManager.class)
+public class DataDuringCallsPreferenceControllerTest {
+    private static final String PREF_KEY = "pref_key";
+    private static final int SUB_ID_1 = 111;
+    private static final int SUB_ID_2 = 222;
+
+    @Mock
+    private TelephonyManager mTelephonyManager;
+    @Mock
+    private Lifecycle mLifecycle;
+    @Mock
+    private PreferenceScreen mPreferenceScreen;
+
+    private Context mContext;
+    private SwitchPreference mSwitchPreference;
+    private DataDuringCallsPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mContext = spy(RuntimeEnvironment.application);
+        doReturn(mTelephonyManager).when(mContext).getSystemService(eq(TelephonyManager.class));
+        when(mTelephonyManager.createForSubscriptionId(anyInt())).thenReturn(mTelephonyManager);
+        mSwitchPreference = new SwitchPreference(mContext);
+        when(mPreferenceScreen.findPreference(PREF_KEY)).thenReturn(mSwitchPreference);
+        mController = new DataDuringCallsPreferenceController(mContext, PREF_KEY);
+        mController.init(mLifecycle, SUB_ID_1);
+    }
+
+    @Test
+    public void getAvailabilityStatus_noInit_notAvailable() {
+        ShadowSubscriptionManager.setDefaultDataSubscriptionId(SUB_ID_1);
+        DataDuringCallsPreferenceController controller =
+                new DataDuringCallsPreferenceController(mContext, PREF_KEY);
+
+        // note that we purposely don't call init first on the controller
+        assertThat(controller.getAvailabilityStatus(INVALID_SUBSCRIPTION_ID)).isEqualTo(
+                CONDITIONALLY_UNAVAILABLE);
+    }
+
+    @Test
+    public void displayPreference_defaultForData_notAvailable() {
+        ShadowSubscriptionManager.setDefaultDataSubscriptionId(SUB_ID_1);
+
+        mController.displayPreference(mPreferenceScreen);
+
+        assertThat(mController.isAvailable()).isFalse();
+        assertThat(mSwitchPreference.isVisible()).isFalse();
+    }
+
+    @Test
+    public void  displayPreference_notDefaultForData_available() {
+        ShadowSubscriptionManager.setDefaultDataSubscriptionId(SUB_ID_2);
+
+        mController.displayPreference(mPreferenceScreen);
+
+        assertThat(mController.isAvailable()).isTrue();
+        assertThat(mSwitchPreference.isVisible()).isTrue();
+    }
+
+    @Test
+    public void onSubscriptionsChanged_becomesDefaultForData_notAvailable() {
+        ShadowSubscriptionManager.setDefaultDataSubscriptionId(SUB_ID_2);
+
+        mController.displayPreference(mPreferenceScreen);
+        ShadowSubscriptionManager.setDefaultDataSubscriptionId(SUB_ID_1);
+        mController.onSubscriptionsChanged();
+
+        assertThat(mController.isAvailable()).isFalse();
+        assertThat(mSwitchPreference.isVisible()).isFalse();
+    }
+
+    @Test
+    public void onSubscriptionsChanged_noLongerDefaultForData_available() {
+        ShadowSubscriptionManager.setDefaultDataSubscriptionId(SUB_ID_1);
+
+        mController.displayPreference(mPreferenceScreen);
+        ShadowSubscriptionManager.setDefaultDataSubscriptionId(SUB_ID_2);
+        mController.onSubscriptionsChanged();
+
+        assertThat(mController.isAvailable()).isTrue();
+        assertThat(mSwitchPreference.isVisible()).isTrue();
+    }
+}