To redirect mobile users to a separate, mobile-optimized version of a landing page upon page load, you can place the following script in the head tag of a landing page. This method works on iPhone, Droid, and Blackberry and is compatible with Acoustic Campaign Landing Pages.
Note: The suggested method is not an officially supported feature.
Script: <script type='text/javascript'>// <![CDATA[var mobile = (/iphone|ipad|ipod|android|blackberry|mini|windows\sce|palm/i.test(navigator.userAgent.toLowerCase())); if (mobile) { document.location = 'INSERT MOBILE URL HERE'; } // ]]></script>