diff --git a/res/values-es/strings.xml b/res/values-es/strings.xml
index cb697b4..865f254 100644
--- a/res/values-es/strings.xml
+++ b/res/values-es/strings.xml
@@ -17,5 +17,5 @@
 <resources xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
     <string name="app_label" product="tablet" msgid="9194799012395299737">"Configuración de red móvil"</string>
-    <string name="app_label" product="default" msgid="8338087656149558019">"Almacenamiento de mensajes y teléfono"</string>
+    <string name="app_label" product="default" msgid="8338087656149558019">"Almac. Mensajes/Teléfono"</string>
 </resources>
diff --git a/res/values-ro/strings.xml b/res/values-ro/strings.xml
index 39fa7b9..a2c590c 100644
--- a/res/values-ro/strings.xml
+++ b/res/values-ro/strings.xml
@@ -16,6 +16,6 @@
 
 <resources xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
-    <string name="app_label" product="tablet" msgid="9194799012395299737">"Configurația rețelei de telefonie mobilă"</string>
+    <string name="app_label" product="tablet" msgid="9194799012395299737">"Configurația reţelei de telefonie mobilă"</string>
     <string name="app_label" product="default" msgid="8338087656149558019">"Stocare Telefon/Mesagerie"</string>
 </resources>
diff --git a/src/com/android/providers/telephony/MmsProvider.java b/src/com/android/providers/telephony/MmsProvider.java
index 9f33864..f588b23 100644
--- a/src/com/android/providers/telephony/MmsProvider.java
+++ b/src/com/android/providers/telephony/MmsProvider.java
@@ -16,6 +16,7 @@
 
 package com.android.providers.telephony;
 
+import android.annotation.NonNull;
 import android.app.AppOpsManager;
 import android.content.ContentProvider;
 import android.content.ContentValues;
@@ -301,7 +302,11 @@
 
     @Override
     public Uri insert(Uri uri, ContentValues values) {
-        // Don't let anyone insert anything with the _data column
+        // The _data column is filled internally in MmsProvider, so this check is just to avoid
+        // it from being inadvertently set. This is not supposed to be a protection against
+        // malicious attack, since sql injection could still be attempted to bypass the check. On
+        // the other hand, the MmsProvider does verify that the _data column has an allowed value
+        // before opening any uri/files.
         if (values != null && values.containsKey(Part._DATA)) {
             return null;
         }
@@ -726,9 +731,12 @@
     }
 
     @Override
-    public int update(Uri uri, ContentValues values,
-            String selection, String[] selectionArgs) {
-        // Don't let anyone update the _data column
+    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+        // The _data column is filled internally in MmsProvider, so this check is just to avoid
+        // it from being inadvertently set. This is not supposed to be a protection against
+        // malicious attack, since sql injection could still be attempted to bypass the check. On
+        // the other hand, the MmsProvider does verify that the _data column has an allowed value
+        // before opening any uri/files.
         if (values != null && values.containsKey(Part._DATA)) {
             return 0;
         }
@@ -834,7 +842,12 @@
             return null;
         }
 
-        // Verify that the _data path points to mms data
+        return safeOpenFileHelper(uri, mode);
+    }
+
+    @NonNull
+    private ParcelFileDescriptor safeOpenFileHelper(
+            @NonNull Uri uri, @NonNull String mode) throws FileNotFoundException {
         Cursor c = query(uri, new String[]{"_data"}, null, null, null);
         int count = (c != null) ? c.getCount() : 0;
         if (count != 1) {
@@ -855,10 +868,16 @@
         c.close();
 
         if (path == null) {
-            return null;
+            throw new FileNotFoundException("Column _data not found.");
         }
+
+        File filePath = new File(path);
         try {
-            File filePath = new File(path);
+            // The MmsProvider shouldn't open a file that isn't MMS data, so we verify that the
+            // _data path actually points to MMS data. That safeguards ourselves from callers who
+            // inserted or updated a URI (more specifically the _data column) with disallowed paths.
+            // TODO(afurtado): provide a more robust mechanism to avoid disallowed _data paths to
+            // be inserted/updated in the first place, including via SQL injection.
             if (!filePath.getCanonicalPath()
                     .startsWith(getContext().getDir(PARTS_DIR_NAME, 0).getCanonicalPath())) {
                 Log.e(TAG, "openFile: path "
@@ -866,7 +885,6 @@
                         + " does not start with "
                         + getContext().getDir(PARTS_DIR_NAME, 0).getCanonicalPath());
                 // Don't care return value
-                filePath.delete();
                 return null;
             }
         } catch (IOException e) {
@@ -874,7 +892,8 @@
             return null;
         }
 
-        return openFileHelper(uri, mode);
+        int modeBits = ParcelFileDescriptor.parseMode(mode);
+        return ParcelFileDescriptor.open(filePath, modeBits);
     }
 
     private void filterUnsupportedKeys(ContentValues values) {