WP_Touch plugin is an excellent plugin created by BraveNewCode Inc which enables your site to be Mobile device friendly instantly without editing any code.
With this plugin active on your WordPress site you won’t have to change your theme or do any custom coding to make your site responsive to small mobile devices such as phones. This plugin does all the work for you.
There is an admin panel where you can edit some of the settings if you so desire to better fit your needs. However the plugin comes ready at default to make your site mobile phone ready.
Make your site touch friendly using WP-Touch.