diff --git a/src/com/android/phone/CallFeaturesSetting.java b/src/com/android/phone/CallFeaturesSetting.java
index 145df41..1dfcde7 100644
--- a/src/com/android/phone/CallFeaturesSetting.java
+++ b/src/com/android/phone/CallFeaturesSetting.java
@@ -58,6 +58,7 @@
 import com.android.ims.ImsManager;
 import com.android.internal.telephony.Phone;
 import com.android.internal.telephony.PhoneConstants;
+import com.android.internal.telephony.flags.Flags;
 import com.android.phone.settings.PhoneAccountSettingsFragment;
 import com.android.phone.settings.SuppServicesUiUtil;
 import com.android.phone.settings.VoicemailSettingsActivity;
@@ -113,6 +114,7 @@
     private PreferenceScreen mVoicemailSettingsScreen;
     private SwitchPreference mEnableVideoCalling;
     private Preference mButtonWifiCalling;
+    private boolean mDisallowedConfig = false;
 
     /*
      * Click Listeners, handle click based on objects attached to UI.
@@ -263,6 +265,14 @@
             return;
         }
 
+        // Check if mobile network configs are restricted.
+        if (Flags.ensureAccessToCallSettingsIsRestricted() &&
+                userManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS)) {
+            mDisallowedConfig = true;
+            Log.i(LOG_TAG, "Mobile network configs are restricted, disabling mobile network "
+                    + "settings");
+        }
+
         mSubscriptionInfoHelper = new SubscriptionInfoHelper(this, getIntent());
         mPhone = mSubscriptionInfoHelper.getPhone();
         mSubscriptionInfoHelper.setActionBarTitle(
@@ -467,7 +477,7 @@
         if (mImsMgr.isVtEnabledByPlatform() && mImsMgr.isVtProvisionedOnDevice()
                 && (carrierConfig.getBoolean(
                         CarrierConfigManager.KEY_IGNORE_DATA_ENABLED_CHANGED_FOR_VIDEO_CALLS)
-                || isDataEnabled)) {
+                || isDataEnabled) && !mDisallowedConfig) {
             boolean currentValue =
                     mImsMgr.isEnhanced4gLteModeSettingEnabledByUser()
                     ? mImsMgr.isVtEnabledByUser() : false;
diff --git a/src/com/android/phone/settings/PhoneAccountSettingsActivity.java b/src/com/android/phone/settings/PhoneAccountSettingsActivity.java
index 12cc667..5617a0b 100644
--- a/src/com/android/phone/settings/PhoneAccountSettingsActivity.java
+++ b/src/com/android/phone/settings/PhoneAccountSettingsActivity.java
@@ -20,12 +20,15 @@
 import android.os.Bundle;
 import android.os.UserManager;
 import android.preference.PreferenceActivity;
+import android.util.Log;
 import android.view.MenuItem;
 import android.widget.Toast;
 
+import com.android.internal.telephony.flags.Flags;
 import com.android.phone.R;
 
 public class PhoneAccountSettingsActivity extends PreferenceActivity {
+    private static final String LOG_TAG = "PhoneAccountSettingsActivity";
 
     @Override
     protected void onCreate(Bundle icicle) {
@@ -40,6 +43,17 @@
             return;
         }
 
+        // Make sure mobile network configs are not restricted.
+        if (Flags.ensureAccessToCallSettingsIsRestricted() &&
+                userManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS)) {
+            Log.i(LOG_TAG, "Mobile network configs are restricted, disabling phone account "
+                    + "settings");
+            Toast.makeText(this, R.string.phone_account_no_config_mobile_networks,
+                    Toast.LENGTH_SHORT).show();
+            finish();
+            return;
+        }
+
         getWindow().addSystemFlags(
                 android.view.WindowManager.LayoutParams
                         .SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
diff --git a/src/com/android/phone/settings/VoicemailSettingsActivity.java b/src/com/android/phone/settings/VoicemailSettingsActivity.java
index c940748..817ca4c 100644
--- a/src/com/android/phone/settings/VoicemailSettingsActivity.java
+++ b/src/com/android/phone/settings/VoicemailSettingsActivity.java
@@ -50,6 +50,7 @@
 import com.android.internal.telephony.CommandsInterface;
 import com.android.internal.telephony.Phone;
 import com.android.internal.telephony.PhoneConstants;
+import com.android.internal.telephony.flags.Flags;
 import com.android.internal.telephony.util.NotificationChannelController;
 import com.android.phone.EditPhoneNumberPreference;
 import com.android.phone.PhoneGlobals;
@@ -200,6 +201,7 @@
     private boolean mShowVoicemailPreference = false;
 
     private boolean mForeground;
+    private boolean mDisallowedConfig = false;
     private Phone mPhone;
     private SubscriptionInfoHelper mSubscriptionInfoHelper;
 
@@ -221,11 +223,20 @@
         // Make sure we are running as the primary user only
         UserManager userManager = getApplicationContext().getSystemService(UserManager.class);
         if (!userManager.isPrimaryUser()) {
-           Toast.makeText(this, R.string.voice_number_setting_primary_user_only,
-                   Toast.LENGTH_SHORT).show();
-           finish();
-           return;
+            Toast.makeText(this, R.string.voice_number_setting_primary_user_only,
+                    Toast.LENGTH_SHORT).show();
+            finish();
+            return;
         }
+
+        // Check if mobile network configs are restricted.
+        if (Flags.ensureAccessToCallSettingsIsRestricted() &&
+                userManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS)) {
+            mDisallowedConfig = true;
+            Log.i(LOG_TAG, "Mobile network configs are restricted, disabling voicemail "
+                    + "settings");
+        }
+
         // Show the voicemail preference in onResume if the calling intent specifies the
         // ACTION_ADD_VOICEMAIL action.
         mShowVoicemailPreference = (icicle == null) &&
@@ -266,7 +277,8 @@
             mSubMenuVoicemailSettings.setDialogOnClosedListener(this);
             mSubMenuVoicemailSettings.setDialogTitle(R.string.voicemail_settings_number_label);
             if (!getBooleanCarrierConfig(
-                    CarrierConfigManager.KEY_EDITABLE_VOICEMAIL_NUMBER_SETTING_BOOL)) {
+                    CarrierConfigManager.KEY_EDITABLE_VOICEMAIL_NUMBER_SETTING_BOOL) ||
+                    mDisallowedConfig) {
                 mSubMenuVoicemailSettings.setEnabled(false);
             }
         }
diff --git a/src/com/android/phone/settings/fdn/FdnSetting.java b/src/com/android/phone/settings/fdn/FdnSetting.java
index e347dec..ddbcc99 100644
--- a/src/com/android/phone/settings/fdn/FdnSetting.java
+++ b/src/com/android/phone/settings/fdn/FdnSetting.java
@@ -33,6 +33,7 @@
 
 import com.android.internal.telephony.CommandException;
 import com.android.internal.telephony.Phone;
+import com.android.internal.telephony.flags.Flags;
 import com.android.phone.CallFeaturesSetting;
 import com.android.phone.PhoneGlobals;
 import com.android.phone.R;