phone number link html w3schools code example
Example 1: html link to call phone number
<a href="tel:+44-785-7895">+44-785-7895</a>
Example 2: phone html
<a href="tel:5551234567"><img src="callme.jpg" /></a>
<a href="tel:+44-785-7895">+44-785-7895</a>
<a href="tel:5551234567"><img src="callme.jpg" /></a>