The better question is, are there any that currently DO NOT support auto linking of phone numbers by default? Main support for iPhone, Android, BB, Windows Phone, Palm.
I'm trying to determine if I should be adding href tags to the phone numbers on multiple client sites (e.g.
<a href="tel:+1-800-555-1212">800-555-1212</a>). The only reason I would be doing such a thing at this point is to allow for backwards mobile (or future) compatibility, however, I'm having a hard time determining if it's worth the time or effort, as these links currently don't do much in a normal browser (FF, IE, Chrome, Safari, etc).