how to run html on phone code example

Example: 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>