How to create hyperlink to call phone number on mobile devices?

Question

What is the proper, universal format for creating a clickable hyperlink for users on mobile devices to call a phone number?

Area code with dashes

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Answer 1

- doesnt make matter but + sign is important when mobile user is in roaming
this is the standard format

+49 (0)176 - 402 063 87

You can read more about it in the spec, see Make Telephone Numbers "Click-to-Call".