The User Agent Profile (UAProf) is used for capturing capability and preference information for wireless devices. This information can be used to detect various types of HTTP headers and other properties for visitor’s mobile device.
Apache provide some useful HTTP X Header information for WAP… which detect user-agent and other hardware/software information.
Source:
http://en.wikipedia.org/wiki/UAProf
http://code.google.com/p/mobiledevicedetector/
http://mobiforge.com/developing/blog/useful-x-headers
http://wapreview.com/?id=149
http://mobiforge.com/developing/story/device-detection-cloud-deviceatlas-personal
http://mobiforge.mobi/developing/story/mobile-sites-with-joomla-cms?dm_switcher=true
http://www.idelfuschini.it/it/apache-mobile-filter-v2x.html
http://www.dpinyc.com/literature/resources/code-bank/php-lightweight-device-detection/
http://logme.mobi/query/index.php