How to mark-up phone numbers?

The tel: scheme was used in the late 1990s and documented in early 2000 with RFC 2806 (which was obsoleted by the more-thorough RFC 3966 in 2004) and continues to be improved. Supporting tel: on the iPhone was not an arbitrary decision. callto:, while supported by Skype, is not a standard and should be avoided unless specifically targeting Skype users. Me? I’d just start including properly-formed tel: URIs on your … Read more