Force download set Content-Disposition header on vCard files Android Browser

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http://serverfault.com – Im trying to force download on a vCard on my site. It works fine on pc.. But when im trying to do it on my android phone on the standard browser, it just shows me the vCard as plain text. If i use Chrome Mobile browser it works just fine.? How can i make this happen? I've found some sites that says i need to add a Content-Disposition header, but i dont know how. There is also a post in here, http://goo.gl/gAHRu - but i cant seem to figure that one out either. Hope you can help (HowTos)