diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index b645f9f..30be255 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -68,6 +68,7 @@
     <uses-permission android:name="android.permission.REBOOT" />
     <uses-permission android:name="android.permission.MANAGE_DEVICE_ADMINS" />
     <uses-permission android:name="android.permission.READ_SEARCH_INDEXABLES" />
+    <uses-permission android:name="android.permission.OEM_UNLOCK_STATE" />
 
     <application android:label="@string/settings_label"
             android:icon="@mipmap/ic_launcher_settings"
diff --git a/res/values/strings.xml b/res/values/strings.xml
index bf975e2..b41f8f4 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -3174,6 +3174,10 @@
     <string name="bt_hci_snoop_log">Enable Bluetooth HCI snoop log</string>
     <!-- setting Checkbox summary whether to capture all bluetooth HCI packets in a file -->
     <string name="bt_hci_snoop_log_summary">Capture all bluetooth HCI packets in a file</string>
+    <!-- setting Checkbox title whether to enable OEM unlock [CHAR_LIMIT=25] -->
+    <string name="oem_unlock_enable">Enable OEM unlock</string>
+    <!-- setting Checkbox summary whether to enable OEM unlock [CHAR_LIMIT=50] -->
+    <string name="oem_unlock_enable_summary">Allow the device to be OEM unlocked</string>
 
     <!-- Setting Checkbox title whether to show options for wireless display certification -->
     <string name="wifi_display_certification">Wireless display certification</string>
diff --git a/res/xml/development_prefs.xml b/res/xml/development_prefs.xml
index ba93c7a..854aa97 100644
--- a/res/xml/development_prefs.xml
+++ b/res/xml/development_prefs.xml
@@ -49,6 +49,11 @@
         android:title="@string/bt_hci_snoop_log"
         android:summary="@string/bt_hci_snoop_log_summary"/>
 
+    <CheckBoxPreference
+        android:key="oem_unlock_enable"
+        android:title="@string/oem_unlock_enable"
+        android:summary="@string/oem_unlock_enable_summary"/>
+
     <PreferenceScreen android:key="proc_stats"
             android:title="@string/process_stats_summary_title"
             android:summary="@string/process_stats_summary"
diff --git a/src/com/android/settings/DevelopmentSettings.java b/src/com/android/settings/DevelopmentSettings.java
index 00a0b92..4c2b90d 100644
--- a/src/com/android/settings/DevelopmentSettings.java
+++ b/src/com/android/settings/DevelopmentSettings.java
@@ -26,7 +26,6 @@
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.DialogInterface;
-import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
@@ -40,7 +39,6 @@
 import android.os.Bundle;
 import android.os.IBinder;
 import android.os.Parcel;
-import android.os.PowerManager;
 import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.os.StrictMode;
@@ -53,6 +51,7 @@
 import android.preference.Preference.OnPreferenceChangeListener;
 import android.preference.PreferenceGroup;
 import android.preference.PreferenceScreen;
+import android.provider.SearchIndexableResource;
 import android.provider.Settings;
 import android.text.TextUtils;
 import android.util.Log;
@@ -64,11 +63,13 @@
 import android.widget.Switch;
 import android.widget.TextView;
 
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settings.search.Indexable;
 import com.android.settings.widget.SwitchBar;
 import dalvik.system.VMRuntime;
 
-import java.io.File;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashSet;
 import java.util.List;
 
@@ -77,7 +78,7 @@
  */
 public class DevelopmentSettings extends SettingsPreferenceFragment
         implements DialogInterface.OnClickListener, DialogInterface.OnDismissListener,
-                OnPreferenceChangeListener, SwitchBar.OnSwitchChangeListener {
+                OnPreferenceChangeListener, SwitchBar.OnSwitchChangeListener, Indexable {
     private static final String TAG = "DevelopmentSettings";
 
     /**
@@ -95,6 +96,7 @@
     private static final String ENABLE_TERMINAL = "enable_terminal";
     private static final String KEEP_SCREEN_ON = "keep_screen_on";
     private static final String BT_HCI_SNOOP_LOG = "bt_hci_snoop_log";
+    private static final String ENABLE_OEM_UNLOCK = "oem_unlock_enable";
     private static final String ALLOW_MOCK_LOCATION = "allow_mock_location";
     private static final String HDCP_CHECKING_KEY = "hdcp_checking";
     private static final String HDCP_CHECKING_PROPERTY = "persist.sys.hdcp_checking";
@@ -160,6 +162,8 @@
 
     private static final int RESULT_DEBUG_APP = 1000;
 
+    private static final String PERSISTENT_DATA_BLOCK_PROP = "ro.frp.pst";
+
     private static String DEFAULT_LOG_RING_BUFFER_SIZE_IN_BYTES = "262144"; // 256K
 
     private IWindowManager mWindowManager;
@@ -180,9 +184,10 @@
     private CheckBoxPreference mBugreportInPower;
     private CheckBoxPreference mKeepScreenOn;
     private CheckBoxPreference mBtHciSnoopLog;
+    private CheckBoxPreference mEnableOemUnlock;
     private CheckBoxPreference mAllowMockLocation;
-    private PreferenceScreen mPassword;
 
+    private PreferenceScreen mPassword;
     private String mDebugApp;
     private Preference mDebugAppPref;
     private CheckBoxPreference mWaitForDebugger;
@@ -190,8 +195,8 @@
     private CheckBoxPreference mWifiDisplayCertification;
     private CheckBoxPreference mWifiVerboseLogging;
     private CheckBoxPreference mWifiAggressiveHandover;
-    private CheckBoxPreference mWifiAllowScansWithTraffic;
 
+    private CheckBoxPreference mWifiAllowScansWithTraffic;
     private CheckBoxPreference mStrictMode;
     private CheckBoxPreference mPointerLocation;
     private CheckBoxPreference mShowTouches;
@@ -213,11 +218,12 @@
     private ListPreference mAnimatorDurationScale;
     private ListPreference mOverlayDisplayDevices;
     private ListPreference mOpenGLTraces;
+
     private ListPreference mSimulateColorSpace;
 
     private CheckBoxPreference mUseNuplayer;
-
     private CheckBoxPreference mImmediatelyDestroyActivities;
+
     private ListPreference mAppProcessLimit;
 
     private CheckBoxPreference mShowAllANRs;
@@ -225,19 +231,18 @@
     private CheckBoxPreference mWebViewDataReductionProxy;
 
     private PreferenceScreen mProcessStats;
-
     private final ArrayList<Preference> mAllPrefs = new ArrayList<Preference>();
+
     private final ArrayList<CheckBoxPreference> mResetCbPrefs
             = new ArrayList<CheckBoxPreference>();
 
     private final HashSet<Preference> mDisabledPrefs = new HashSet<Preference>();
-
     // To track whether a confirmation dialog was clicked.
     private boolean mDialogClicked;
     private Dialog mEnableDialog;
     private Dialog mAdbDialog;
-    private Dialog mAdbKeysDialog;
 
+    private Dialog mAdbKeysDialog;
     private boolean mUnavailable;
 
     @Override
@@ -282,10 +287,15 @@
         mBugreportInPower = findAndInitCheckboxPref(BUGREPORT_IN_POWER_KEY);
         mKeepScreenOn = findAndInitCheckboxPref(KEEP_SCREEN_ON);
         mBtHciSnoopLog = findAndInitCheckboxPref(BT_HCI_SNOOP_LOG);
+        mEnableOemUnlock = findAndInitCheckboxPref(ENABLE_OEM_UNLOCK);
+        if (!showEnableOemUnlockPreference()) {
+            removePreference(mEnableOemUnlock);
+        }
         mAllowMockLocation = findAndInitCheckboxPref(ALLOW_MOCK_LOCATION);
         mPassword = (PreferenceScreen) findPreference(LOCAL_BACKUP_PASSWORD);
         mAllPrefs.add(mPassword);
 
+
         if (!android.os.Process.myUserHandle().equals(UserHandle.OWNER)) {
             disableForUser(mEnableAdb);
             disableForUser(mClearAdbKeys);
@@ -500,6 +510,7 @@
                 Settings.Global.STAY_ON_WHILE_PLUGGED_IN, 0) != 0);
         updateCheckBox(mBtHciSnoopLog, Settings.Secure.getInt(cr,
                 Settings.Secure.BLUETOOTH_HCI_LOG, 0) != 0);
+        updateCheckBox(mEnableOemUnlock, Utils.isOemUnlockEnabled(getActivity()));
         updateCheckBox(mAllowMockLocation, Settings.Secure.getInt(cr,
                 Settings.Secure.ALLOW_MOCK_LOCATION, 0) != 0);
         updateHdcpValues();
@@ -674,6 +685,10 @@
                 Settings.Global.PACKAGE_VERIFIER_SETTING_VISIBLE, 1) > 0;
     }
 
+    private static boolean showEnableOemUnlockPreference() {
+        return !SystemProperties.get(PERSISTENT_DATA_BLOCK_PROP).equals("");
+    }
+
     private void updateBugreportOptions() {
         if ("user".equals(Build.TYPE)) {
             final ContentResolver resolver = getActivity().getContentResolver();
@@ -1317,9 +1332,11 @@
             Settings.Global.putInt(getActivity().getContentResolver(),
                     Settings.Global.STAY_ON_WHILE_PLUGGED_IN,
                     mKeepScreenOn.isChecked() ?
-                    (BatteryManager.BATTERY_PLUGGED_AC | BatteryManager.BATTERY_PLUGGED_USB) : 0);
+                            (BatteryManager.BATTERY_PLUGGED_AC | BatteryManager.BATTERY_PLUGGED_USB) : 0);
         } else if (preference == mBtHciSnoopLog) {
             writeBtHciSnoopLogOptions();
+        } else if (preference == mEnableOemUnlock) {
+            Utils.setOemUnlockEnabled(getActivity(), mEnableOemUnlock.isChecked());
         } else if (preference == mAllowMockLocation) {
             Settings.Secure.putInt(getActivity().getContentResolver(),
                     Settings.Secure.ALLOW_MOCK_LOCATION,
@@ -1535,4 +1552,27 @@
             return false;
         }
     }
+
+    /**
+     * For Search.
+     */
+    public static final Indexable.SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider() {
+                @Override
+                public List<SearchIndexableResource> getXmlResourcesToIndex(
+                        Context context, boolean enabled) {
+                    final SearchIndexableResource sir = new SearchIndexableResource(context);
+                    sir.xmlResId = R.xml.development_prefs;
+                    return Arrays.asList(sir);
+                }
+
+                @Override
+                public List<String> getNonIndexableKeys(Context context) {
+                    final List<String> keys = new ArrayList<String>();
+                    if (!showEnableOemUnlockPreference()) {
+                        keys.add(ENABLE_OEM_UNLOCK);
+                    }
+                    return keys;
+                }
+            };
 }
diff --git a/src/com/android/settings/Utils.java b/src/com/android/settings/Utils.java
index 692d8f3..8211816 100644
--- a/src/com/android/settings/Utils.java
+++ b/src/com/android/settings/Utils.java
@@ -18,14 +18,12 @@
 
 import android.app.ActivityManager;
 import android.app.AlertDialog;
-import android.app.AlertDialog.Builder;
 import android.app.Dialog;
 import android.app.Fragment;
 import android.app.IActivityManager;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.DialogInterface;
-import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
@@ -55,6 +53,7 @@
 import android.provider.ContactsContract.Data;
 import android.provider.ContactsContract.Profile;
 import android.provider.ContactsContract.RawContacts;
+import android.service.persistentdata.PersistentDataBlockManager;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.Log;
@@ -62,8 +61,6 @@
 import android.view.ViewGroup;
 import android.widget.ListView;
 import android.widget.TabWidget;
-
-import com.android.settings.R.string;
 import com.android.settings.dashboard.DashboardCategory;
 import com.android.settings.dashboard.DashboardTile;
 
@@ -670,4 +667,23 @@
                 .create();
         return dlg;
     }
+
+    /**
+     * Returns whether or not this device is able to be OEM unlocked.
+     */
+    static boolean isOemUnlockEnabled(Context context) {
+        PersistentDataBlockManager manager =(PersistentDataBlockManager)
+                context.getSystemService(Context.PERSISTENT_DATA_BLOCK_SERVICE);
+        return manager.getOemUnlockEnabled();
+    }
+
+    /**
+     * Allows enabling or disabling OEM unlock on this device. OEM unlocked
+     * devices allow users to flash other OSes to them.
+     */
+    static void setOemUnlockEnabled(Context context, boolean enabled) {
+        PersistentDataBlockManager manager =(PersistentDataBlockManager)
+                context.getSystemService(Context.PERSISTENT_DATA_BLOCK_SERVICE);
+        manager.setOemUnlockEnabled(enabled);
+    }
 }
diff --git a/src/com/android/settings/search/SearchIndexableResources.java b/src/com/android/settings/search/SearchIndexableResources.java
index 287d78f..4e35a72 100644
--- a/src/com/android/settings/search/SearchIndexableResources.java
+++ b/src/com/android/settings/search/SearchIndexableResources.java
@@ -245,7 +245,7 @@
         sResMap.put(DevelopmentSettings.class.getName(),
                 new SearchIndexableResource(
                         Ranking.getRankForClassName(DevelopmentSettings.class.getName()),
-                        R.xml.development_prefs,
+                        NO_DATA_RES_ID,
                         DevelopmentSettings.class.getName(),
                         R.drawable.ic_settings_development));