diff --git a/src/com/android/phone/GsmUmtsCallForwardOptions.java b/src/com/android/phone/GsmUmtsCallForwardOptions.java
index 4fda860..58afd81 100755
--- a/src/com/android/phone/GsmUmtsCallForwardOptions.java
+++ b/src/com/android/phone/GsmUmtsCallForwardOptions.java
@@ -5,6 +5,7 @@
 import android.app.Dialog;
 import android.content.BroadcastReceiver;
 import android.content.Context;
+import android.content.ContentProvider;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.IntentFilter;
@@ -13,7 +14,9 @@
 import android.net.NetworkInfo;
 import android.os.Bundle;
 import android.os.PersistableBundle;
+import android.os.Process;
 import android.os.SystemProperties;
+import android.os.UserHandle;
 import android.preference.Preference;
 import android.preference.PreferenceScreen;
 import android.provider.Settings;
@@ -469,6 +472,15 @@
         }
         Cursor cursor = null;
         try {
+            // check if the URI returned by the user belongs to the user
+            final int currentUser = UserHandle.getUserId(Process.myUid());
+            if (currentUser
+                    != ContentProvider.getUserIdFromUri(data.getData(), currentUser)) {
+
+                Log.w(LOG_TAG, "onActivityResult: Contact data of different user, "
+                        + "cannot access");
+                return;
+            }
             cursor = getContentResolver().query(data.getData(),
                 NUM_PROJECTION, null, null, null);
             if ((cursor == null) || (!cursor.moveToFirst())) {
diff --git a/src/com/android/phone/settings/VoicemailSettingsActivity.java b/src/com/android/phone/settings/VoicemailSettingsActivity.java
index a930dba..886ce3c 100644
--- a/src/com/android/phone/settings/VoicemailSettingsActivity.java
+++ b/src/com/android/phone/settings/VoicemailSettingsActivity.java
@@ -17,6 +17,7 @@
 package com.android.phone.settings;
 
 import android.app.Dialog;
+import android.content.ContentProvider;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.database.Cursor;
@@ -25,6 +26,8 @@
 import android.os.Handler;
 import android.os.Message;
 import android.os.PersistableBundle;
+import android.os.Process;
+import android.os.UserHandle;
 import android.os.UserManager;
 import android.preference.Preference;
 import android.preference.PreferenceActivity;
@@ -522,6 +525,17 @@
 
             Cursor cursor = null;
             try {
+                // check if the URI returned by the user belongs to the user
+                final int currentUser = UserHandle.getUserId(Process.myUid());
+                if (currentUser
+                        != ContentProvider.getUserIdFromUri(data.getData(), currentUser)) {
+
+                    if (DBG) {
+                        log("onActivityResult: Contact data of different user, "
+                                + "cannot access");
+                    }
+                    return;
+                }
                 cursor = getContentResolver().query(data.getData(),
                     new String[] { CommonDataKinds.Phone.NUMBER }, null, null, null);
                 if ((cursor == null) || (!cursor.moveToFirst())) {
diff --git a/src/com/android/phone/settings/fdn/EditFdnContactScreen.java b/src/com/android/phone/settings/fdn/EditFdnContactScreen.java
index 8614648..7a8e89c 100644
--- a/src/com/android/phone/settings/fdn/EditFdnContactScreen.java
+++ b/src/com/android/phone/settings/fdn/EditFdnContactScreen.java
@@ -18,9 +18,12 @@
 
 import static android.view.Window.PROGRESS_VISIBILITY_OFF;
 import static android.view.Window.PROGRESS_VISIBILITY_ON;
+import static android.app.Activity.RESULT_OK;
+
 
 import android.app.Activity;
 import android.content.AsyncQueryHandler;
+import android.content.ContentProvider;
 import android.content.ContentResolver;
 import android.content.ContentValues;
 import android.content.Intent;
@@ -30,6 +33,8 @@
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.PersistableBundle;
+import android.os.Process;
+import android.os.UserHandle;
 import android.provider.ContactsContract.CommonDataKinds;
 import android.telephony.PhoneNumberUtils;
 import android.text.Editable;
@@ -165,6 +170,14 @@
                 }
                 Cursor cursor = null;
                 try {
+                    // check if the URI returned by the user belongs to the user
+                    final int currentUser = UserHandle.getUserId(Process.myUid());
+                    if (currentUser
+                            != ContentProvider.getUserIdFromUri(intent.getData(), currentUser)) {
+                        Log.w(LOG_TAG, "onActivityResult: Contact data of different user, "
+                                + "cannot access");
+                        return;
+                    }
                     cursor = getContentResolver().query(intent.getData(),
                         NUM_PROJECTION, null, null, null);
                     if ((cursor == null) || (!cursor.moveToFirst())) {