diff --git a/src/com/android/phone/CellInfoUtil.java b/src/com/android/phone/CellInfoUtil.java
index c0409d8..2c5f2a8 100644
--- a/src/com/android/phone/CellInfoUtil.java
+++ b/src/com/android/phone/CellInfoUtil.java
@@ -34,6 +34,8 @@
 
 import com.android.internal.telephony.OperatorInfo;
 
+import java.util.List;
+
 /**
  * Add static Utility functions to get information from the CellInfo object.
  * TODO: Modify {@link CellInfo} for simplify those functions
@@ -166,4 +168,10 @@
         }
         return oi;
     }
+
+    /** Checks whether the network operator is forbidden. */
+    public static boolean isForbidden(CellInfo cellInfo, List<String> forbiddenPlmns) {
+        String plmn = CellInfoUtil.getOperatorInfoFromCellInfo(cellInfo).getOperatorNumeric();
+        return forbiddenPlmns != null && forbiddenPlmns.contains(plmn);
+    }
 }
diff --git a/src/com/android/phone/NetworkOperatorPreference.java b/src/com/android/phone/NetworkOperatorPreference.java
index f29c038..85adf16 100644
--- a/src/com/android/phone/NetworkOperatorPreference.java
+++ b/src/com/android/phone/NetworkOperatorPreference.java
@@ -30,25 +30,30 @@
 
 import com.android.settingslib.graph.SignalDrawable;
 
+import java.util.List;
+
 /**
  * A Preference represents a network operator in the NetworkSelectSetting fragment.
  */
 public class NetworkOperatorPreference extends Preference {
 
     private static final String TAG = "NetworkOperatorPref";
-    private static final boolean DBG = true;
+    private static final boolean DBG = false;
     // number of signal strength level
     public static final int NUMBER_OF_LEVELS = SignalStrength.NUM_SIGNAL_STRENGTH_BINS;
     private CellInfo mCellInfo;
+    private List<String> mForbiddenPlmns;
     private int mLevel = -1;
 
     // The following constants are used to draw signal icon.
     private static final Drawable EMPTY_DRAWABLE = new ColorDrawable(Color.TRANSPARENT);
     private static final int NO_CELL_DATA_CONNECTED_ICON = 0;
 
-    public NetworkOperatorPreference(CellInfo cellinfo, Context context) {
+    public NetworkOperatorPreference(
+            CellInfo cellinfo, Context context, List<String> forbiddenPlmns) {
         super(context);
         mCellInfo = cellinfo;
+        mForbiddenPlmns = forbiddenPlmns;
         refresh();
     }
 
@@ -61,7 +66,11 @@
      */
     public void refresh() {
         if (DBG) Log.d(TAG, "refresh the network: " + CellInfoUtil.getNetworkTitle(mCellInfo));
-        setTitle(CellInfoUtil.getNetworkTitle(mCellInfo));
+        String networkTitle = CellInfoUtil.getNetworkTitle(mCellInfo);
+        if (CellInfoUtil.isForbidden(mCellInfo, mForbiddenPlmns)) {
+            networkTitle += " " + getContext().getResources().getString(R.string.forbidden_network);
+        }
+        setTitle(networkTitle);
         int level = CellInfoUtil.getLevel(mCellInfo);
         if (DBG) Log.d(TAG, "refresh level: " + String.valueOf(level));
         if (mLevel != level) {
diff --git a/src/com/android/phone/NetworkSelectListPreference.java b/src/com/android/phone/NetworkSelectListPreference.java
index 2a55839..5b31b68 100644
--- a/src/com/android/phone/NetworkSelectListPreference.java
+++ b/src/com/android/phone/NetworkSelectListPreference.java
@@ -20,6 +20,7 @@
 import android.content.Context;
 import android.content.DialogInterface;
 import android.os.AsyncResult;
+import android.os.AsyncTask;
 import android.os.Handler;
 import android.os.Message;
 import android.os.Parcel;
@@ -47,6 +48,7 @@
 import com.android.internal.telephony.PhoneFactory;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 
@@ -76,6 +78,7 @@
 
     private int mSubId;
     private NetworkOperators mNetworkOperators;
+    private List<String> mForbiddenPlmns;
 
     private ProgressDialog mProgressDialog;
     public NetworkSelectListPreference(Context context, AttributeSet attrs) {
@@ -89,10 +92,21 @@
 
     @Override
     protected void onClick() {
-        // Start the one-time network scan via {@link Phone#getAvailableNetworks()}.
-        // {@link NetworkQueryService will return a {@link onResults()} callback first with a list
-        // of CellInfo, and then will return a {@link onComplete} indicating the scan completed.
-        loadNetworksList();
+        showProgressDialog(DIALOG_NETWORK_LIST_LOAD);
+        TelephonyManager telephonyManager = (TelephonyManager)
+                getContext().getSystemService(Context.TELEPHONY_SERVICE);
+        new AsyncTask<Void, Void, List<String>>() {
+            @Override
+            protected List<String> doInBackground(Void... voids) {
+                return Arrays.asList(telephonyManager.getForbiddenPlmns());
+            }
+
+            @Override
+            protected void onPostExecute(List<String> result) {
+                mForbiddenPlmns = result;
+                loadNetworksList();
+            }
+        }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
     }
 
     private final Handler mHandler = new Handler() {
@@ -155,7 +169,7 @@
 
         /** Returns the scan results to the user, this callback will be called only one time. */
         public void onResults(List<CellInfo> results) {
-            if (DBG) logd("get scan results.");
+            if (DBG) logd("get scan results: " + results.toString());
             Message msg = mHandler.obtainMessage(EVENT_NETWORK_SCAN_RESULTS, results);
             msg.sendToTarget();
         }
@@ -283,9 +297,6 @@
 
     private void loadNetworksList() {
         if (DBG) logd("load networks list...");
-
-        showProgressDialog(DIALOG_NETWORK_LIST_LOAD);
-
         try {
             if (mNetworkQueryService != null) {
                 mNetworkQueryService.startNetworkQuery(mCallback, mPhoneId, false);
@@ -325,6 +336,10 @@
                 // Display each operator name only once.
                 String networkTitle = getNetworkTitle(cellInfo);
                 if (!networkEntriesList.contains(networkTitle)) {
+                    if (CellInfoUtil.isForbidden(cellInfo, mForbiddenPlmns)) {
+                        networkTitle += " "
+                                + getContext().getResources().getString(R.string.forbidden_network);
+                    }
                     networkEntriesList.add(networkTitle);
                     networkEntryValuesList.add(getOperatorNumeric(cellInfo));
                 }
diff --git a/src/com/android/phone/NetworkSelectSetting.java b/src/com/android/phone/NetworkSelectSetting.java
index efa8684..71162bb 100644
--- a/src/com/android/phone/NetworkSelectSetting.java
+++ b/src/com/android/phone/NetworkSelectSetting.java
@@ -22,6 +22,7 @@
 import android.content.Intent;
 import android.content.ServiceConnection;
 import android.os.AsyncResult;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.IBinder;
@@ -50,6 +51,7 @@
 import com.android.internal.telephony.PhoneFactory;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -60,7 +62,7 @@
 public class NetworkSelectSetting extends PreferenceFragment {
 
     private static final String TAG = "NetworkSelectSetting";
-    private static final boolean DBG = false;
+    private static final boolean DBG = true;
 
     private static final int EVENT_NETWORK_SELECTION_DONE = 1;
     private static final int EVENT_NETWORK_SCAN_RESULTS = 2;
@@ -84,6 +86,7 @@
     private NetworkOperatorPreference mSelectedNetworkOperatorPreference;
     private TelephonyManager mTelephonyManager;
     private NetworkOperators mNetworkOperators;
+    private List<String> mForbiddenPlmns;
 
     private final Runnable mUpdateNetworkOperatorsRunnable = () -> {
         updateNetworkOperatorsPreferenceCategory();
@@ -103,7 +106,7 @@
 
     @Override
     public void onCreate(Bundle icicle) {
-        logd("onCreate");
+        if (DBG) logd("onCreate");
         super.onCreate(icicle);
 
         mPhoneId = getArguments().getInt(NetworkSelectSettingActivity.KEY_PHONE_ID);
@@ -123,7 +126,7 @@
 
     @Override
     public void onViewCreated(View view, Bundle savedInstanceState) {
-        logd("onViewCreated");
+        if (DBG) logd("onViewCreated");
         super.onViewCreated(view, savedInstanceState);
 
         if (getListView() != null) {
@@ -154,9 +157,18 @@
     public void onStart() {
         if (DBG) logd("onStart");
         super.onStart();
+        new AsyncTask<Void, Void, List<String>>() {
+            @Override
+            protected List<String> doInBackground(Void... voids) {
+                return Arrays.asList(mTelephonyManager.getForbiddenPlmns());
+            }
 
-        // Bind the NetworkQueryService
-        bindNetworkQueryService();
+            @Override
+            protected void onPostExecute(List<String> result) {
+                mForbiddenPlmns = result;
+                bindNetworkQueryService();
+            }
+        }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
     }
 
     /**
@@ -382,8 +394,8 @@
         configConnectedNetworkOperatorsPreferenceCategory();
         for (int index = 0; index < mCellInfoList.size(); index++) {
             if (!mCellInfoList.get(index).isRegistered()) {
-                NetworkOperatorPreference pref =
-                        new NetworkOperatorPreference(mCellInfoList.get(index), getContext());
+                NetworkOperatorPreference pref = new NetworkOperatorPreference(
+                        mCellInfoList.get(index), getContext(), mForbiddenPlmns);
                 pref.setKey(CellInfoUtil.getNetworkTitle(mCellInfoList.get(index)));
                 pref.setOrder(index);
                 mNetworkOperatorsPreferences.addPreference(pref);
@@ -422,7 +434,7 @@
             if (cellInfo != null) {
                 if (DBG) logd("Currently registered cell: " + cellInfo.toString());
                 NetworkOperatorPreference pref =
-                        new NetworkOperatorPreference(cellInfo, getContext());
+                        new NetworkOperatorPreference(cellInfo, getContext(), mForbiddenPlmns);
                 pref.setTitle(mTelephonyManager.getNetworkOperatorName());
                 pref.setSummary(R.string.network_connected);
                 // Update the signal strength icon, since the default signalStrength value would be
@@ -503,7 +515,7 @@
         // Remove the current ConnectedNetworkOperatorsPreference
         removeConnectedNetworkOperatorPreference();
         final NetworkOperatorPreference pref =
-                new NetworkOperatorPreference(cellInfo, getContext());
+                new NetworkOperatorPreference(cellInfo, getContext(), mForbiddenPlmns);
         pref.setSummary(R.string.network_connected);
         mConnectedNetworkOperatorsPreference.addPreference(pref);
         PreferenceScreen preferenceScreen = getPreferenceScreen();