How to use a html for phone code example

Example 1: html phone

<a href="tel:0123456789">Click to call</a>
<!-- Adds country code with + -->
<a href="tel:+0123456789">Click to call</a> 
<!-- Adds a 1 second pause (p) then dial 123 after phone number -->
<a href="tel:0123456789p123">Click to call</a>

Example 2: phone html

<a href="tel:1234567">Call 123-4567</a>