diff --git a/src/com/android/settings/network/SubscriptionsChangeListener.java b/src/com/android/settings/network/SubscriptionsChangeListener.java
new file mode 100644
index 0000000..c3bb22b
--- /dev/null
+++ b/src/com/android/settings/network/SubscriptionsChangeListener.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2018 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 android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.database.ContentObserver;
+import android.net.Uri;
+import android.os.Handler;
+import android.provider.Settings;
+import android.telephony.SubscriptionManager;
+import android.telephony.SubscriptionManager.OnSubscriptionsChangedListener;
+
+import com.android.internal.telephony.TelephonyIntents;
+
+/** Helper class for listening to changes in availability of telephony subscriptions */
+public class SubscriptionsChangeListener extends ContentObserver {
+
+    public interface SubscriptionsChangeListenerClient {
+        void onAirplaneModeChanged(boolean airplaneModeEnabled);
+        void onSubscriptionsChanged();
+    }
+
+    private Context mContext;
+    private SubscriptionsChangeListenerClient mClient;
+    private SubscriptionManager mSubscriptionManager;
+    private OnSubscriptionsChangedListener mSubscriptionsChangedListener;
+    private Uri mAirplaneModeSettingUri;
+    private BroadcastReceiver mBroadcastReceiver;
+
+    public SubscriptionsChangeListener(Context context, SubscriptionsChangeListenerClient client) {
+        super(new Handler());
+        mContext = context;
+        mClient = client;
+        mSubscriptionManager = mContext.getSystemService(SubscriptionManager.class);
+        mSubscriptionsChangedListener = new OnSubscriptionsChangedListener() {
+            @Override
+            public void onSubscriptionsChanged() {
+                subscriptionsChangedCallback();
+            }
+        };
+        mAirplaneModeSettingUri = Settings.Global.getUriFor(Settings.Global.AIRPLANE_MODE_ON);
+        mBroadcastReceiver = new BroadcastReceiver() {
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                subscriptionsChangedCallback();
+            }
+        };
+    }
+
+    public void start() {
+        mSubscriptionManager.addOnSubscriptionsChangedListener(mSubscriptionsChangedListener);
+        mContext.getContentResolver()
+                .registerContentObserver(mAirplaneModeSettingUri, false, this);
+        final IntentFilter radioTechnologyChangedFilter = new IntentFilter(
+                TelephonyIntents.ACTION_RADIO_TECHNOLOGY_CHANGED);
+        mContext.registerReceiver(mBroadcastReceiver, radioTechnologyChangedFilter);
+    }
+
+    public void stop() {
+        mSubscriptionManager.removeOnSubscriptionsChangedListener(mSubscriptionsChangedListener);
+        mContext.getContentResolver().unregisterContentObserver(this);
+        mContext.unregisterReceiver(mBroadcastReceiver);
+    }
+
+    public boolean isAirplaneModeOn() {
+        return Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.AIRPLANE_MODE_ON, 0) != 0;
+    }
+
+    private void subscriptionsChangedCallback() {
+        mClient.onSubscriptionsChanged();
+    }
+
+    @Override
+    public void onChange(boolean selfChange, Uri uri) {
+        if (uri.equals(mAirplaneModeSettingUri)) {
+            mClient.onAirplaneModeChanged(isAirplaneModeOn());
+        }
+    }
+}
diff --git a/tests/robotests/src/com/android/settings/network/SubscriptionsChangeListenerTest.java b/tests/robotests/src/com/android/settings/network/SubscriptionsChangeListenerTest.java
new file mode 100644
index 0000000..88ea2ea
--- /dev/null
+++ b/tests/robotests/src/com/android/settings/network/SubscriptionsChangeListenerTest.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2018 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 com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.AdditionalMatchers.eq;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyBoolean;
+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.BroadcastReceiver;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.database.ContentObserver;
+import android.net.Uri;
+import android.provider.Settings;
+import android.telephony.SubscriptionManager;
+
+import com.android.settings.network.SubscriptionsChangeListener.SubscriptionsChangeListenerClient;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+public class SubscriptionsChangeListenerTest {
+
+    @Mock
+    private SubscriptionsChangeListenerClient mClient;
+    @Mock
+    private SubscriptionManager mSubscriptionManager;
+
+    private Context mContext;
+    private SubscriptionsChangeListener mListener;
+    private Uri mAirplaneModeUri;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mContext = spy(RuntimeEnvironment.application);
+        when(mContext.getSystemService(SubscriptionManager.class)).thenReturn(mSubscriptionManager);
+
+        mAirplaneModeUri = Settings.Global.getUriFor(Settings.Global.AIRPLANE_MODE_ON);
+    }
+
+    private void initListener(boolean alsoStart) {
+        mListener = new SubscriptionsChangeListener(mContext, mClient);
+        if (alsoStart) {
+            mListener.start();
+        }
+    }
+
+    @Test
+    public void whenStartNotCalled_noListeningWasSetup() {
+        final ContentResolver contentResolver = mock(ContentResolver.class);
+        when(mContext.getContentResolver()).thenReturn(contentResolver);
+        initListener(false);
+        verify(contentResolver, never()).registerContentObserver(any(Uri.class), anyBoolean(),
+                any(ContentObserver.class));
+        verify(mSubscriptionManager, never()).addOnSubscriptionsChangedListener(any());
+        verify(mContext, never()).registerReceiver(any(), any());
+    }
+
+    @Test
+    public void onSubscriptionsChangedEvent_subscriptionManagerFires_eventDeliveredToUs() {
+        initListener(true);
+        final ArgumentCaptor<SubscriptionManager.OnSubscriptionsChangedListener> captor =
+                ArgumentCaptor.forClass(SubscriptionManager.OnSubscriptionsChangedListener.class);
+        verify(mSubscriptionManager).addOnSubscriptionsChangedListener(captor.capture());
+        captor.getValue().onSubscriptionsChanged();
+        verify(mClient).onSubscriptionsChanged();
+    }
+
+    @Test
+    public void onSubscriptionsChangedEvent_radioTechnologyChangedBroadcast_eventDeliveredToUs() {
+        initListener(true);
+        final ArgumentCaptor<BroadcastReceiver> broadcastReceiverCaptor =
+                ArgumentCaptor.forClass(BroadcastReceiver.class);
+        verify(mContext).registerReceiver(broadcastReceiverCaptor.capture(), any());
+        broadcastReceiverCaptor.getValue().onReceive(mContext, null);
+        verify(mClient).onSubscriptionsChanged();
+    }
+
+    @Test
+    public void onAirplaneModeChangedEvent_becameTrue_eventFires() {
+        initListener(true);
+        Settings.Global.putInt(mContext.getContentResolver(), Settings.Global.AIRPLANE_MODE_ON, 1);
+        mListener.onChange(false, mAirplaneModeUri);
+        verify(mClient).onAirplaneModeChanged(true);
+        assertThat(mListener.isAirplaneModeOn()).isTrue();
+    }
+
+    @Test
+    public void onAirplaneModeChangedEvent_becameFalse_eventFires() {
+        initListener(true);
+        Settings.Global.putInt(mContext.getContentResolver(), Settings.Global.AIRPLANE_MODE_ON, 0);
+        mListener.onChange(false, mAirplaneModeUri);
+        verify(mClient).onAirplaneModeChanged(false);
+        assertThat(mListener.isAirplaneModeOn()).isFalse();
+    }
+
+}