Transcoding Prevention

Many mobile network operators implemented "content transcoders" or "transcoding proxies" (Vodafone and TeliaSonera are among them). These content transcoders make the desktop web available on mobile devices. One of the side effects is that, already mobile optimized portals are also reformatted, destroying a carefully designed mobile user experience.

The line of code below in the .htaccess file could prevent content transcoders from altering your mobile web content.

Cache-Control: no-transform

Read more at the articles below:
http://mobiforge.com/developing/blog/responsible-reformatting
http://mobiforge.com/developing/story/setting-http-headers-advise-transcoding-proxies