diff --git a/src/com/android/settings/SecuritySettings.java b/src/com/android/settings/SecuritySettings.java
index 5d031ef..dc4c42b 100644
--- a/src/com/android/settings/SecuritySettings.java
+++ b/src/com/android/settings/SecuritySettings.java
@@ -160,6 +160,11 @@
             mUseLocation = useLocation;
         }
 
+        // Change the summary for wifi-only devices
+        if (Utils.isWifiOnly()) {
+            mNetwork.setSummaryOn(R.string.location_neighborhood_level_wifi);
+        }
+
         // Add options for lock/unlock screen
         int resid = 0;
         if (!mLockPatternUtils.isSecure()) {
diff --git a/src/com/android/settings/Utils.java b/src/com/android/settings/Utils.java
index d635403..dd80222 100644
--- a/src/com/android/settings/Utils.java
+++ b/src/com/android/settings/Utils.java
@@ -278,4 +278,8 @@
                 (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
         return telephony != null && telephony.isVoiceCapable();
     }
+
+    public static boolean isWifiOnly() {
+        return "wifi-only".equals(SystemProperties.get("ro.carrier"));
+    }
 }
diff --git a/src/com/android/settings/WirelessSettings.java b/src/com/android/settings/WirelessSettings.java
index bdf8ce8..9567c01 100644
--- a/src/com/android/settings/WirelessSettings.java
+++ b/src/com/android/settings/WirelessSettings.java
@@ -48,6 +48,7 @@
     private static final String KEY_VPN_SETTINGS = "vpn_settings";
     private static final String KEY_TETHER_SETTINGS = "tether_settings";
     private static final String KEY_PROXY_SETTINGS = "proxy_settings";
+    private static final String KEY_MOBILE_NETWORK_SETTINGS = "mobile_network_settings";
 
     public static final String EXIT_ECM_RESULT = "exit_ecm_result";
     public static final int REQUEST_CODE_EXIT_ECM = 1;
@@ -131,6 +132,11 @@
             getPreferenceScreen().removePreference(nfc);
         }
 
+        // Remove Mobile Network Settings if it's a wifi-only device.
+        if (Utils.isWifiOnly()) {
+            getPreferenceScreen().removePreference(findPreference(KEY_MOBILE_NETWORK_SETTINGS));
+        }
+
         // Enable Proxy selector settings if allowed.
         Preference mGlobalProxy = findPreference(KEY_PROXY_SETTINGS);
         DevicePolicyManager mDPM = (DevicePolicyManager)
@@ -139,10 +145,10 @@
         getPreferenceScreen().removePreference(mGlobalProxy);
         mGlobalProxy.setEnabled(mDPM.getGlobalProxyAdmin() == null);
 
-        // Disable Tethering if it's not allowed
+        // Disable Tethering if it's not allowed or if it's a wifi-only device
         ConnectivityManager cm =
                 (ConnectivityManager) activity.getSystemService(Context.CONNECTIVITY_SERVICE);
-        if (!cm.isTetheringSupported()) {
+        if (!cm.isTetheringSupported() || Utils.isWifiOnly()) {
             getPreferenceScreen().removePreference(findPreference(KEY_TETHER_SETTINGS));
         } else {
             String[] usbRegexs = cm.getTetherableUsbRegexs();
diff --git a/src/com/android/settings/wifi/WifiSettings.java b/src/com/android/settings/wifi/WifiSettings.java
index 1222e77..5a2bf45 100644
--- a/src/com/android/settings/wifi/WifiSettings.java
+++ b/src/com/android/settings/wifi/WifiSettings.java
@@ -21,6 +21,7 @@
 import com.android.settings.ProgressCategoryBase;
 import com.android.settings.R;
 import com.android.settings.SettingsPreferenceFragment;
+import com.android.settings.Utils;
 
 import android.app.Activity;
 import android.app.AlertDialog;
@@ -211,11 +212,15 @@
 
             ListPreference pref = (ListPreference) findPreference(KEY_SLEEP_POLICY);
             if (pref != null) {
-                pref.setOnPreferenceChangeListener(this);
-                int value = Settings.System.getInt(getContentResolver(),
-                        Settings.System.WIFI_SLEEP_POLICY,
-                        Settings.System.WIFI_SLEEP_POLICY_NEVER);
-                pref.setValue(String.valueOf(value));
+                if (Utils.isWifiOnly()) {
+                    getPreferenceScreen().removePreference(pref);
+                } else {
+                    pref.setOnPreferenceChangeListener(this);
+                    int value = Settings.System.getInt(getContentResolver(),
+                            Settings.System.WIFI_SLEEP_POLICY,
+                            Settings.System.WIFI_SLEEP_POLICY_NEVER);
+                    pref.setValue(String.valueOf(value));
+                }
             }
 
             registerForContextMenu(getListView());