diff --git a/js/ui/cordova/plugins/cordova-plugin-file/www/blackberry10/readAsBinaryString.js b/js/ui/cordova/plugins/cordova-plugin-file/www/blackberry10/readAsBinaryString.js
new file mode 100644
index 0000000..8e40e3f
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+++ b/js/ui/cordova/plugins/cordova-plugin-file/www/blackberry10/readAsBinaryString.js
@@ -0,0 +1,68 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+*/
+
+/* 
+ * readAsBinaryString
+ * 
+ * IN:
+ *  args
+ *   0 - URL of file to read
+ *   1 - start position
+ *   2 - end position
+ * OUT:
+ *  success - BinaryString contents of file
+ *  fail - FileError
+ */
+
+var resolve = cordova.require('cordova-plugin-file.resolveLocalFileSystemURIProxy'),
+    requestAnimationFrame = cordova.require('cordova-plugin-file.bb10RequestAnimationFrame');
+
+module.exports = function (success, fail, args) {
+    var uri = args[0],
+        start = args[1],
+        end = args[2],
+        onSuccess = function (data) {
+            if (typeof success === 'function') {
+                success(data);
+            }
+        },
+        onFail = function (error) {
+            if (typeof fail === 'function') {
+                if (error && error.code) {
+                    fail(error.code);
+                } else {
+                    fail(error);
+                }
+            }
+        };
+    resolve(function (fs) {
+        requestAnimationFrame(function () {
+            fs.nativeEntry.file(function (file) {
+                var reader = new FileReader()._realReader;
+                reader.onloadend = function () {
+                    onSuccess(this.result.substring(start, end));
+                };
+                reader.onerror = onFail;
+                reader.readAsBinaryString(file); 
+            }, onFail);
+        });
+    }, fail, [uri]);
+};