It's easily possible to make WPtouch work on all kind of mobile phones including Nokia, Sony Ericsson, Samsung etc. To make this happen you need to tweak the wptouch.php file in the root of the plugin folder. The $container array in detectAppleMobile function need to have more browser/OS name string match. To know detail illustration with free source code please have a look at http://abcoder.com/wordpress/plugins/wptouch-iphone-theme-for-abcoder/
Thanks
Adnan