diff --git a/src/com/android/settings/DateTimeSettings.java b/src/com/android/settings/DateTimeSettings.java
index 3935d59..1d8e341 100644
--- a/src/com/android/settings/DateTimeSettings.java
+++ b/src/com/android/settings/DateTimeSettings.java
@@ -94,7 +94,7 @@
         mAutoTimeZonePref = (CheckBoxPreference) findPreference(KEY_AUTO_TIME_ZONE);
         // Override auto-timezone if it's a wifi-only device or if we're still in setup wizard.
         // TODO: Remove the wifiOnly test when auto-timezone is implemented based on wifi-location.
-        if (Utils.isWifiOnly() || isFirstRun) {
+        if (Utils.isWifiOnly(getActivity()) || isFirstRun) {
             getPreferenceScreen().removePreference(mAutoTimeZonePref);
             autoTimeZoneEnabled = false;
         }
diff --git a/src/com/android/settings/DeviceInfoSettings.java b/src/com/android/settings/DeviceInfoSettings.java
index 76f5a8e..337233e 100644
--- a/src/com/android/settings/DeviceInfoSettings.java
+++ b/src/com/android/settings/DeviceInfoSettings.java
@@ -87,7 +87,7 @@
                 PROPERTY_URL_SAFETYLEGAL);
 
         // Remove Baseband version if wifi-only device
-        if (Utils.isWifiOnly()) {
+        if (Utils.isWifiOnly(getActivity())) {
             getPreferenceScreen().removePreference(findPreference(KEY_BASEBAND_VERSION));
         }
 
diff --git a/src/com/android/settings/LocationSettings.java b/src/com/android/settings/LocationSettings.java
index 0824aab..ef438e6 100644
--- a/src/com/android/settings/LocationSettings.java
+++ b/src/com/android/settings/LocationSettings.java
@@ -101,7 +101,7 @@
         }
 
         // Change the summary for wifi-only devices
-        if (Utils.isWifiOnly()) {
+        if (Utils.isWifiOnly(getActivity())) {
             mNetwork.setSummaryOn(R.string.location_neighborhood_level_wifi);
         }
 
diff --git a/src/com/android/settings/Utils.java b/src/com/android/settings/Utils.java
index 73a9a30..2d2b654 100644
--- a/src/com/android/settings/Utils.java
+++ b/src/com/android/settings/Utils.java
@@ -290,8 +290,10 @@
         return telephony != null && telephony.isVoiceCapable();
     }
 
-    public static boolean isWifiOnly() {
-        return "wifi-only".equals(SystemProperties.get("ro.carrier"));
+    public static boolean isWifiOnly(Context context) {
+        ConnectivityManager cm = (ConnectivityManager)context.getSystemService(
+                Context.CONNECTIVITY_SERVICE);
+        return (cm.isNetworkSupported(ConnectivityManager.TYPE_MOBILE) == false);
     }
 
     /**
diff --git a/src/com/android/settings/WirelessSettings.java b/src/com/android/settings/WirelessSettings.java
index e1fc882..b10b93fb 100644
--- a/src/com/android/settings/WirelessSettings.java
+++ b/src/com/android/settings/WirelessSettings.java
@@ -129,7 +129,7 @@
         }
 
         // Remove Mobile Network Settings if it's a wifi-only device.
-        if (Utils.isWifiOnly()) {
+        if (Utils.isWifiOnly(getActivity())) {
             getPreferenceScreen().removePreference(findPreference(KEY_MOBILE_NETWORK_SETTINGS));
         }
 
diff --git a/src/com/android/settings/deviceinfo/Status.java b/src/com/android/settings/deviceinfo/Status.java
index 987fab8..57a8e94 100644
--- a/src/com/android/settings/deviceinfo/Status.java
+++ b/src/com/android/settings/deviceinfo/Status.java
@@ -194,7 +194,7 @@
         mSignalStrength = findPreference(KEY_SIGNAL_STRENGTH);
         mUptime = findPreference("up_time");
 
-        if (Utils.isWifiOnly()) {
+        if (Utils.isWifiOnly(getApplicationContext())) {
             for (String key : PHONE_RELATED_ENTRIES) {
                 removePreferenceFromScreen(key);
             }
@@ -263,7 +263,7 @@
     protected void onResume() {
         super.onResume();
 
-        if (!Utils.isWifiOnly()) {
+        if (!Utils.isWifiOnly(getApplicationContext())) {
             mPhoneStateReceiver.registerIntent();
 
             updateSignalStrength();
@@ -281,7 +281,7 @@
     public void onPause() {
         super.onPause();
 
-        if (!Utils.isWifiOnly()) {
+        if (!Utils.isWifiOnly(getApplicationContext())) {
             mPhoneStateReceiver.unregisterIntent();
             mTelephonyManager.listen(mPhoneStateListener, PhoneStateListener.LISTEN_NONE);
         }
diff --git a/src/com/android/settings/fuelgauge/BatteryHistoryChart.java b/src/com/android/settings/fuelgauge/BatteryHistoryChart.java
index 13a962d..a229888 100644
--- a/src/com/android/settings/fuelgauge/BatteryHistoryChart.java
+++ b/src/com/android/settings/fuelgauge/BatteryHistoryChart.java
@@ -378,7 +378,7 @@
         mNumHist = lastInteresting;
         mHaveGps = (aggrStates&HistoryItem.STATE_GPS_ON_FLAG) != 0;
         mHaveWifi = (aggrStates&HistoryItem.STATE_WIFI_RUNNING_FLAG) != 0;
-        if (!com.android.settings.Utils.isWifiOnly()) {
+        if (!com.android.settings.Utils.isWifiOnly(getContext())) {
             mHavePhoneSignal = true;
         }
         if (mHistEnd <= mHistStart) mHistEnd = mHistStart+1;
diff --git a/src/com/android/settings/fuelgauge/PowerUsageSummary.java b/src/com/android/settings/fuelgauge/PowerUsageSummary.java
index f28ba93..32ba279 100644
--- a/src/com/android/settings/fuelgauge/PowerUsageSummary.java
+++ b/src/com/android/settings/fuelgauge/PowerUsageSummary.java
@@ -713,7 +713,7 @@
         addBluetoothUsage(uSecNow);
         addIdleUsage(uSecNow); // Not including cellular idle power
         // Don't compute radio usage if it's a wifi-only device
-        if (!com.android.settings.Utils.isWifiOnly()) {
+        if (!com.android.settings.Utils.isWifiOnly(getActivity())) {
             addRadioUsage(uSecNow);
         }
     }
diff --git a/src/com/android/settings/wifi/AdvancedWifiSettings.java b/src/com/android/settings/wifi/AdvancedWifiSettings.java
index 7ec546b..7fb9871 100644
--- a/src/com/android/settings/wifi/AdvancedWifiSettings.java
+++ b/src/com/android/settings/wifi/AdvancedWifiSettings.java
@@ -97,7 +97,7 @@
 
         ListPreference sleepPolicyPref = (ListPreference) findPreference(KEY_SLEEP_POLICY);
         if (sleepPolicyPref != null) {
-            if (Utils.isWifiOnly()) {
+            if (Utils.isWifiOnly(getActivity())) {
                 sleepPolicyPref.setEntries(R.array.wifi_sleep_policy_entries_wifi_only);
                 sleepPolicyPref.setSummary(R.string.wifi_setting_sleep_policy_summary_wifi_only);
             }