diff --git a/res/xml/network_setting_fragment.xml b/res/xml/network_setting_fragment.xml
index 669a29c..459a269 100644
--- a/res/xml/network_setting_fragment.xml
+++ b/res/xml/network_setting_fragment.xml
@@ -117,16 +117,6 @@
         android:dialogTitle="@string/cdma_subscription_dialogtitle"
         settings:controller="com.android.settings.network.telephony.cdma.CdmaSubscriptionPreferenceController"/>
 
-    <!--We want separate APN setting from reset of settings because we want user to change it with caution-->
-    <PreferenceCategory
-        android:key="category_cdma_apn_key">
-        <com.android.settingslib.RestrictedPreference
-            android:key="button_cdma_apn_key"
-            android:title="@string/apn_settings"
-            android:persistent="false"
-            settings:controller="com.android.settings.network.telephony.cdma.CdmaApnPreferenceController"/>
-    </PreferenceCategory>
-
     <PreferenceCategory
         android:key="network_operators_category_key"
         android:title="@string/network_operator_category"
@@ -144,6 +134,14 @@
             settings:controller="com.android.settings.network.telephony.gsm.OpenNetworkSelectPagePreferenceController"/>
     </PreferenceCategory>
 
+    <!--We want separate APN setting from reset of settings because we want user to change it with caution-->
+    <com.android.settingslib.RestrictedPreference
+        android:key="telephony_apn_key"
+        android:persistent="false"
+        android:title="@string/apn_settings"
+        settings:allowDividerAbove="true"
+        settings:controller="com.android.settings.network.telephony.ApnPreferenceController"/>
+
     <Preference
         android:key="carrier_settings_key"
         android:title="@string/carrier_settings_title"
diff --git a/src/com/android/settings/network/telephony/ApnPreferenceController.java b/src/com/android/settings/network/telephony/ApnPreferenceController.java
new file mode 100644
index 0000000..e02d9d4
--- /dev/null
+++ b/src/com/android/settings/network/telephony/ApnPreferenceController.java
@@ -0,0 +1,143 @@
+/*
+ * 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.telephony;
+
+import static android.provider.Telephony.Carriers.ENFORCE_MANAGED_URI;
+
+import android.content.Context;
+import android.content.Intent;
+import android.database.ContentObserver;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.PersistableBundle;
+import android.provider.Settings;
+import android.telephony.CarrierConfigManager;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.SettingsActivity;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.network.ApnSettings;
+import com.android.settingslib.RestrictedLockUtilsInternal;
+import com.android.settingslib.RestrictedPreference;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnStart;
+import com.android.settingslib.core.lifecycle.events.OnStop;
+
+/**
+ * Preference controller for "Apn settings"
+ */
+public class ApnPreferenceController extends BasePreferenceController implements
+        LifecycleObserver, OnStart, OnStop {
+
+    @VisibleForTesting
+    CarrierConfigManager mCarrierConfigManager;
+    private int mSubId;
+    private Preference mPreference;
+    private DpcApnEnforcedObserver mDpcApnEnforcedObserver;
+
+    public ApnPreferenceController(Context context, String key) {
+        super(context, key);
+        mCarrierConfigManager = new CarrierConfigManager(context);
+        mDpcApnEnforcedObserver = new DpcApnEnforcedObserver(new Handler(Looper.getMainLooper()));
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        final PersistableBundle carrierConfig = mCarrierConfigManager.getConfigForSubId(mSubId);
+        final boolean isCdmaApn = MobileNetworkUtils.isCdmaOptions(mContext, mSubId)
+                && carrierConfig.getBoolean(CarrierConfigManager.KEY_SHOW_APN_SETTING_CDMA_BOOL);
+        final boolean isGsmApn = MobileNetworkUtils.isGsmOptions(mContext, mSubId)
+                && carrierConfig.getBoolean(CarrierConfigManager.KEY_APN_EXPAND_BOOL);
+
+        return carrierConfig != null
+                && (isCdmaApn || isGsmApn)
+                ? AVAILABLE
+                : CONDITIONALLY_UNAVAILABLE;
+    }
+
+    @Override
+    public void onStart() {
+        mDpcApnEnforcedObserver.register(mContext);
+    }
+
+    @Override
+    public void onStop() {
+        mDpcApnEnforcedObserver.unRegister(mContext);
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        ((RestrictedPreference) mPreference).setDisabledByAdmin(
+                MobileNetworkUtils.isDpcApnEnforced(mContext)
+                        ? RestrictedLockUtilsInternal.getDeviceOwner(mContext)
+                        : null);
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        if (getPreferenceKey().equals(preference.getKey())) {
+            // This activity runs in phone process, we must use intent to start
+            final Intent intent = new Intent(Settings.ACTION_APN_SETTINGS);
+            // This will setup the Home and Search affordance
+            intent.putExtra(SettingsActivity.EXTRA_SHOW_FRAGMENT_AS_SUBSETTING, true);
+            intent.putExtra(ApnSettings.SUB_ID, mSubId);
+            mContext.startActivity(intent);
+            return true;
+        }
+
+        return false;
+    }
+
+    public void init(int subId) {
+        mSubId = subId;
+    }
+
+    @VisibleForTesting
+    void setPreference(Preference preference) {
+        mPreference = preference;
+    }
+
+    private class DpcApnEnforcedObserver extends ContentObserver {
+        DpcApnEnforcedObserver(Handler handler) {
+            super(handler);
+        }
+
+        public void register(Context context) {
+            context.getContentResolver().registerContentObserver(ENFORCE_MANAGED_URI, false, this);
+
+        }
+
+        public void unRegister(Context context) {
+            context.getContentResolver().unregisterContentObserver(this);
+        }
+
+        @Override
+        public void onChange(boolean selfChange) {
+            updateState(mPreference);
+        }
+    }
+}
diff --git a/src/com/android/settings/network/telephony/GsmUmtsOptions.java b/src/com/android/settings/network/telephony/GsmUmtsOptions.java
deleted file mode 100644
index 9954764..0000000
--- a/src/com/android/settings/network/telephony/GsmUmtsOptions.java
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * 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.telephony;
-
-import android.content.Context;
-import android.content.Intent;
-import android.os.PersistableBundle;
-import android.provider.Settings;
-import android.telephony.CarrierConfigManager;
-import android.telephony.TelephonyManager;
-
-import androidx.preference.Preference;
-import androidx.preference.PreferenceFragmentCompat;
-import androidx.preference.PreferenceScreen;
-
-import com.android.internal.logging.MetricsLogger;
-import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
-import com.android.internal.telephony.Phone;
-import com.android.internal.telephony.PhoneConstants;
-import com.android.settings.R;
-import com.android.settingslib.RestrictedLockUtilsInternal;
-import com.android.settingslib.RestrictedPreference;
-
-/**
- * List of Network-specific settings screens.
- */
-public class GsmUmtsOptions {
-    private static final String LOG_TAG = "GsmUmtsOptions";
-
-    private CarrierConfigManager mCarrierConfigManager;
-    private RestrictedPreference mButtonAPNExpand;
-    private Preference mCategoryAPNExpand;
-    Preference mCarrierSettingPref;
-
-    private static final String BUTTON_APN_EXPAND_KEY = "button_gsm_apn_key";
-    private static final String CATEGORY_APN_EXPAND_KEY = "category_gsm_apn_key";
-    private static final String BUTTON_CARRIER_SETTINGS_KEY = "carrier_settings_key";
-
-    public static final String EXTRA_SUB_ID = "sub_id";
-    private PreferenceFragmentCompat mPrefFragment;
-    private PreferenceScreen mPrefScreen;
-
-    public GsmUmtsOptions(PreferenceFragmentCompat prefFragment, PreferenceScreen prefScreen,
-            final int subId) {
-        final Context context = prefFragment.getContext();
-        mPrefFragment = prefFragment;
-        mPrefScreen = prefScreen;
-        mCarrierConfigManager = new CarrierConfigManager(context);
-        mPrefFragment.addPreferencesFromResource(R.xml.gsm_umts_options);
-        mButtonAPNExpand = (RestrictedPreference) mPrefScreen.findPreference(BUTTON_APN_EXPAND_KEY);
-        mCategoryAPNExpand = mPrefScreen.findPreference(CATEGORY_APN_EXPAND_KEY);
-        mCarrierSettingPref = mPrefScreen.findPreference(BUTTON_CARRIER_SETTINGS_KEY);
-
-        update(subId);
-    }
-
-    // Unlike mPrefFragment or mPrefScreen, subId  may change during lifecycle of GsmUmtsOptions.
-    // When that happens, we update GsmUmtsOptions with new parameters.
-    protected void update(final int subId) {
-        boolean addAPNExpand = true;
-
-        boolean addCarrierSettings = true;
-        final TelephonyManager telephonyManager = TelephonyManager.from(mPrefFragment.getContext())
-                .createForSubscriptionId(subId);
-        //TODO(b/115429509): Get phone from subId
-        Phone phone = null;
-        if (phone == null) return;
-        if (telephonyManager.getPhoneType() != PhoneConstants.PHONE_TYPE_GSM) {
-            log("Not a GSM phone");
-            addAPNExpand = false;
-        } else {
-            log("Not a CDMA phone");
-            PersistableBundle carrierConfig = mCarrierConfigManager.getConfigForSubId(subId);
-
-            // Determine which options to display. For GSM these are defaulted to true in
-            // CarrierConfigManager, but they maybe overriden by DefaultCarrierConfigService or a
-            // carrier app.
-            // Note: these settings used to be controlled with overlays in
-            // Telephony/res/values/config.xml
-            if (!carrierConfig.getBoolean(CarrierConfigManager.KEY_APN_EXPAND_BOOL)
-                    && mCategoryAPNExpand != null) {
-                addAPNExpand = false;
-            }
-
-            // Read platform settings for carrier settings
-            addCarrierSettings = carrierConfig.getBoolean(
-                    CarrierConfigManager.KEY_CARRIER_SETTINGS_ENABLE_BOOL);
-        }
-
-        // Making no assumptions of whether they are added or removed at this point.
-        // Calling add or remove explicitly to make sure they are updated.
-
-        if (addAPNExpand) {
-            log("update: addAPNExpand");
-            mButtonAPNExpand.setDisabledByAdmin(
-                    MobileNetworkUtils.isDpcApnEnforced(mButtonAPNExpand.getContext())
-                            ? RestrictedLockUtilsInternal.getDeviceOwner(
-                            mButtonAPNExpand.getContext())
-                            : null);
-            mButtonAPNExpand.setOnPreferenceClickListener(
-                    new Preference.OnPreferenceClickListener() {
-                        @Override
-                        public boolean onPreferenceClick(Preference preference) {
-                            MetricsLogger.action(mButtonAPNExpand.getContext(),
-                                    MetricsEvent.ACTION_MOBILE_NETWORK_APN_SETTINGS);
-                            // We need to build the Intent by hand as the Preference Framework
-                            // does not allow to add an Intent with some extras into a Preference
-                            // XML file
-                            final Intent intent = new Intent(Settings.ACTION_APN_SETTINGS);
-                            // This will setup the Home and Search affordance
-                            intent.putExtra(":settings:show_fragment_as_subsetting", true);
-                            intent.putExtra(EXTRA_SUB_ID, subId);
-                            mPrefFragment.startActivity(intent);
-                            return true;
-                        }
-                    });
-            mPrefScreen.addPreference(mCategoryAPNExpand);
-        } else {
-            mPrefScreen.removePreference(mCategoryAPNExpand);
-        }
-
-        if (addCarrierSettings) {
-            mPrefScreen.addPreference(mCarrierSettingPref);
-        } else {
-            mPrefScreen.removePreference(mCarrierSettingPref);
-        }
-
-    }
-
-    protected boolean preferenceTreeClick(Preference preference) {
-        return false;
-    }
-
-    protected void log(String s) {
-        android.util.Log.d(LOG_TAG, s);
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/settings/network/telephony/MobileNetworkFragment.java b/src/com/android/settings/network/telephony/MobileNetworkFragment.java
index 507fdf4..1e788f7 100644
--- a/src/com/android/settings/network/telephony/MobileNetworkFragment.java
+++ b/src/com/android/settings/network/telephony/MobileNetworkFragment.java
@@ -56,7 +56,6 @@
 import com.android.internal.telephony.TelephonyIntents;
 import com.android.settings.R;
 import com.android.settings.dashboard.DashboardFragment;
-import com.android.settings.network.telephony.cdma.CdmaApnPreferenceController;
 import com.android.settings.network.telephony.cdma.CdmaSubscriptionPreferenceController;
 import com.android.settings.network.telephony.cdma.CdmaSystemSelectPreferenceController;
 import com.android.settings.network.telephony.gsm.AutoSelectPreferenceController;
@@ -128,9 +127,6 @@
     private ImsManager mImsMgr;
     private boolean mOkClicked;
 
-    //GsmUmts options and Cdma options
-    GsmUmtsOptions mGsmUmtsOptions;
-
     private String mClickedPrefKey;
     private boolean mShow4GForLTE;
     private boolean mIsGlobalCdma;
@@ -159,9 +155,6 @@
         /** TODO: Refactor and get rid of the if's using subclasses */
         if (preference.getKey().equals(BUTTON_4G_LTE_KEY)) {
             return true;
-        } else if (mGsmUmtsOptions != null &&
-                mGsmUmtsOptions.preferenceTreeClick(preference) == true) {
-            return true;
         } else if (TextUtils.equals(key, BUTTON_CDMA_SYSTEM_SELECT_KEY)
                 || TextUtils.equals(key, BUTTON_CDMA_SUBSCRIPTION_KEY)) {
             if (mTelephonyManager.getEmergencyCallbackMode()) {
@@ -213,7 +206,7 @@
 
         use(MobileDataPreferenceController.class).init(getFragmentManager(), mSubId);
         use(RoamingPreferenceController.class).init(getFragmentManager(), mSubId);
-        use(CdmaApnPreferenceController.class).init(mSubId);
+        use(ApnPreferenceController.class).init(mSubId);
         use(CarrierPreferenceController.class).init(mSubId);
         use(DataUsagePreferenceController.class).init(mSubId);
         use(PreferredNetworkModePreferenceController.class).init(mSubId);
@@ -693,11 +686,6 @@
         // We don't want to re-create GsmUmtsOptions if already exists. Otherwise, the
         // preferences inside it will also be re-created which causes unexpected behavior.
         // For example, the open dialog gets dismissed or detached after pause / resume.
-        if (mGsmUmtsOptions == null) {
-            mGsmUmtsOptions = new GsmUmtsOptions(prefFragment, prefScreen, subId);
-        } else {
-            mGsmUmtsOptions.update(subId);
-        }
     }
 
     private static Intent buildPhoneAccountConfigureIntent(
diff --git a/src/com/android/settings/network/telephony/cdma/CdmaApnPreferenceController.java b/src/com/android/settings/network/telephony/cdma/CdmaApnPreferenceController.java
deleted file mode 100644
index eaacdb2..0000000
--- a/src/com/android/settings/network/telephony/cdma/CdmaApnPreferenceController.java
+++ /dev/null
@@ -1,87 +0,0 @@
-/*
- * 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.telephony.cdma;
-
-import android.content.Context;
-import android.content.Intent;
-import android.os.PersistableBundle;
-import android.provider.Settings;
-import android.telephony.CarrierConfigManager;
-
-import androidx.annotation.VisibleForTesting;
-import androidx.preference.Preference;
-import androidx.preference.PreferenceScreen;
-
-import com.android.settings.SettingsActivity;
-import com.android.settings.network.ApnSettings;
-import com.android.settings.network.telephony.MobileNetworkUtils;
-import com.android.settingslib.RestrictedLockUtilsInternal;
-import com.android.settingslib.RestrictedPreference;
-
-/**
- * Preference controller for "CDMA Apn"
- */
-public class CdmaApnPreferenceController extends CdmaBasePreferenceController {
-
-    private static final String CATEGORY_KEY = "category_cdma_apn_key";
-    @VisibleForTesting
-    CarrierConfigManager mCarrierConfigManager;
-
-    public CdmaApnPreferenceController(Context context, String key) {
-        super(context, key);
-        mCarrierConfigManager = new CarrierConfigManager(context);
-    }
-
-    @Override
-    public int getAvailabilityStatus() {
-        final PersistableBundle carrierConfig = mCarrierConfigManager.getConfigForSubId(mSubId);
-
-        return carrierConfig != null
-                && carrierConfig.getBoolean(CarrierConfigManager.KEY_SHOW_APN_SETTING_CDMA_BOOL)
-                && MobileNetworkUtils.isCdmaOptions(mContext, mSubId)
-                ? AVAILABLE
-                : CONDITIONALLY_UNAVAILABLE;
-    }
-
-    @Override
-    public void displayPreference(PreferenceScreen screen) {
-        super.displayPreference(screen);
-        if (isAvailable()) {
-            ((RestrictedPreference) mPreference).setDisabledByAdmin(
-                    MobileNetworkUtils.isDpcApnEnforced(mContext)
-                            ? RestrictedLockUtilsInternal.getDeviceOwner(mContext)
-                            : null);
-        } else {
-            screen.findPreference(CATEGORY_KEY).setVisible(false);
-        }
-    }
-
-    @Override
-    public boolean handlePreferenceTreeClick(Preference preference) {
-        if (getPreferenceKey().equals(preference.getKey())) {
-            // This activity runs in phone process, we must use intent to start
-            final Intent intent = new Intent(Settings.ACTION_APN_SETTINGS);
-            // This will setup the Home and Search affordance
-            intent.putExtra(SettingsActivity.EXTRA_SHOW_FRAGMENT_AS_SUBSETTING, true);
-            intent.putExtra(ApnSettings.SUB_ID, mSubId);
-            mContext.startActivity(intent);
-            return true;
-        }
-
-        return false;
-    }
-}
diff --git a/tests/robotests/src/com/android/settings/network/telephony/cdma/CdmaApnPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/network/telephony/ApnPreferenceControllerTest.java
similarity index 83%
rename from tests/robotests/src/com/android/settings/network/telephony/cdma/CdmaApnPreferenceControllerTest.java
rename to tests/robotests/src/com/android/settings/network/telephony/ApnPreferenceControllerTest.java
index 2aceda7..0fda51f 100644
--- a/tests/robotests/src/com/android/settings/network/telephony/cdma/CdmaApnPreferenceControllerTest.java
+++ b/tests/robotests/src/com/android/settings/network/telephony/ApnPreferenceControllerTest.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.settings.network.telephony.cdma;
+package com.android.settings.network.telephony;
 
 import static com.android.settings.core.BasePreferenceController.AVAILABLE;
 import static com.android.settings.core.BasePreferenceController.CONDITIONALLY_UNAVAILABLE;
@@ -47,7 +47,7 @@
 import org.robolectric.RuntimeEnvironment;
 
 @RunWith(SettingsRobolectricTestRunner.class)
-public class CdmaApnPreferenceControllerTest {
+public class ApnPreferenceControllerTest {
     private static final int SUB_ID = 2;
 
     @Mock
@@ -59,7 +59,7 @@
     @Mock
     private CarrierConfigManager mCarrierConfigManager;
 
-    private CdmaApnPreferenceController mController;
+    private ApnPreferenceController mController;
     private RestrictedPreference mPreference;
     private Context mContext;
 
@@ -73,11 +73,12 @@
         doReturn(mTelephonyManager).when(mTelephonyManager).createForSubscriptionId(SUB_ID);
         doReturn(mInvalidTelephonyManager).when(mTelephonyManager).createForSubscriptionId(
                 SubscriptionManager.INVALID_SUBSCRIPTION_ID);
+        doReturn(mCarrierConfigManager).when(mContext).getSystemService(CarrierConfigManager.class);
 
         mPreference = new RestrictedPreference(mContext);
-        mController = new CdmaApnPreferenceController(mContext, "mobile_data");
+        mController = new ApnPreferenceController(mContext, "mobile_data");
         mController.init(SUB_ID);
-        mController.mPreference = mPreference;
+        mController.setPreference(mPreference);
         mController.mCarrierConfigManager = mCarrierConfigManager;
         mPreference.setKey(mController.getPreferenceKey());
     }
@@ -103,6 +104,16 @@
     }
 
     @Test
+    public void getAvailabilityStatus_apnSettingsSupportedWithGsm_returnAvailable() {
+        doReturn(PhoneConstants.PHONE_TYPE_GSM).when(mTelephonyManager).getPhoneType();
+        final PersistableBundle bundle = new PersistableBundle();
+        bundle.putBoolean(CarrierConfigManager.KEY_APN_EXPAND_BOOL, true);
+        doReturn(bundle).when(mCarrierConfigManager).getConfigForSubId(SUB_ID);
+
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(AVAILABLE);
+    }
+
+    @Test
     public void handPreferenceTreeClick_fireIntent() {
         ArgumentCaptor<Intent> captor = ArgumentCaptor.forClass(Intent.class);