Which 'contact information' format has the broadest support for mobile phone QR code scanners?

vCard? mecard? hCard?

Is there a de facto standard at this point? I've never personally owned a 'smartphone' -- is there a format that's supported 'out-of-the-box' for either iphone, android or blackberry?

edit:

• found this discussion from last year. Any thoughts?

  • this reader appears to be multiplatform开发者_Python百科 and uses mecard

  • mecard spec

hCard is a vcard that supports html in data. Mecard, is a very lite version of vcard. One line with important info. vCard, is a format to exchange contacts data. Allot of version there.

turns out vCard, although verbose, has the broadest support.

Mecard is a de facto (read: avoid at all costs) standard