diff --git a/src/com/android/settings/network/MobileDataContentObserver.java b/src/com/android/settings/network/MobileDataContentObserver.java
index b8a1c8c1a5a..15e726f5f53 100644
--- a/src/com/android/settings/network/MobileDataContentObserver.java
+++ b/src/com/android/settings/network/MobileDataContentObserver.java
@@ -33,9 +33,13 @@ public class MobileDataContentObserver extends ContentObserver {
         super(handler);
     }
 
-    public static Uri getObservableUri(int subId) {
+    /**
+     * Return a URI of mobile data(ON vs OFF)
+     */
+    public static Uri getObservableUri(Context context, int subId) {
         Uri uri = Settings.Global.getUriFor(Settings.Global.MOBILE_DATA);
-        if (TelephonyManager.getDefault().getSimCount() != 1) {
+        TelephonyManager telephonyManager = context.getSystemService(TelephonyManager.class);
+        if (telephonyManager.getSimCount() != 1) {
             uri = Settings.Global.getUriFor(Settings.Global.MOBILE_DATA + subId);
         }
         return uri;
@@ -54,7 +58,7 @@ public class MobileDataContentObserver extends ContentObserver {
     }
 
     public void register(Context context, int subId) {
-        final Uri uri = getObservableUri(subId);
+        final Uri uri = getObservableUri(context, subId);
         context.getContentResolver().registerContentObserver(uri, false, this);
 
     }
diff --git a/src/com/android/settings/network/telephony/MobileDataSlice.java b/src/com/android/settings/network/telephony/MobileDataSlice.java
index 152028c05ca..c70ae1a89da 100644
--- a/src/com/android/settings/network/telephony/MobileDataSlice.java
+++ b/src/com/android/settings/network/telephony/MobileDataSlice.java
@@ -252,7 +252,7 @@ public class MobileDataSlice implements CustomSliceable {
             }
 
             public void register(Context context, int subId) {
-                final Uri uri = MobileDataContentObserver.getObservableUri(subId);
+                final Uri uri = MobileDataContentObserver.getObservableUri(context, subId);
                 context.getContentResolver().registerContentObserver(uri, false, this);
             }