Terence Eden. He has a beard and is smiling.

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WURFL and Database Copyright

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When a phone's web browser visits your site, how can you tell what capabilities that phone has? How can you work out its screensize, whether it can play mp3s, or know if it supports a particular bit of JavaScript? It ought to be possible using a mixture of UAProf, accept headers, and media queries. But it's not. The data are inconsistent and unreliable. Out of this frustration, a number of…