Not working on HTC One X

It seems wp-mobile-detect does not work on a HTC One X smartphone. I use following code:

[ Moderator note: Code fixed, please wrap code in backticks or use the code button. ]

<?php
    if (function_exists('wpmd_is_notdevice') &&  wpmd_is_notdevice()) { echo "Desktop";
    } else
      {echo "Smartphone or tablet";
    }
?>

It works great on Samsung Galaxy Tab2 talet and Samsung Galaxy S4 mini Phone so as such the plugin does its work properly.
Has anyone an idea how to solve this?

https://www.ads-software.com/plugins/wp-mobile-detect/