Mobile Content plugin allows you to use shortcodes to display different content, in your posts, pages, or widget areas, depending on the device it is being viewed on. Using these shortcodes you can specify to only show certain content to computers, tablets, or mobile phones. You can also target OS like iOS, Android, and Windows Mobile. Target specific devices including iPhone, iPad, Blackberry, Kindle, HTC, Nexus, Motorola, Samsung, Sony, and Palm.
See full list of shortcodes at: http://www.wpmobilecontent.com