Ask HN: Why do websites ignore my use desktop version preference

1 pointleejw00t3543 comments

When using my mobile, a WP7 HTC Trophy, I set my browser to as default load websites in their desktop version. This usually works 9 times out of 10 but I sometimes find the site will display a mobile version anyway. Why does this happen? Is it done on purpose or by sloppy coding?

Is there some kind of special header for requesting a mobile version of a website or do they just use the user-agent?

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