J2ME Get Unicode HTML source

public String getSourceFromUrl() throws IOException {
    //if (true) return "I love google";
    String strRet = "";
    HttpConnection httpConn = null;
    String url = "http://huypv.net/t/xs.php";

    InputStream is = null;
    OutputStream os = null;
  

    try {
        // Open an HTTP Connection object
        httpConn = (HttpConnection) Connector.open(url);



        // Setup HTTP Request
        httpConn.setRequestMethod(HttpConnection.GET);
        httpConn.setRequestProperty("User-Agent",
                "Profile/MIDP-1.0 Confirguration/CLDC-2.0");


        /** Initiate connection and check for the response code. If the
        response code is HTTP_OK then get the content from the target
         **/
        int respCode = httpConn.getResponseCode();
        if (respCode == httpConn.HTTP_OK) {
            StringBuffer sb = new StringBuffer();
            os = httpConn.openOutputStream();
            is = httpConn.openDataInputStream();
            InputStreamReader isr = new InputStreamReader(is, "UTF-8");
            int chr;
            while ((chr = isr.read()) != -1) {
                sb.append((char) chr);
            }
            strRet = sb.toString();
             System.out.println("Response " + strRet);
        } else {
            System.out.println("Error in opening HTTP Connection. Error#" + respCode);
        }

    } finally {
        if (is != null) {
            is.close();
        }
        if (os != null) {
            os.close();
        }
        if (httpConn != null) {
            httpConn.close();
        }
    }
    return strRet;
}