I just updated this file on your site: /templates/ja_alpha/html/com_contact/contact/default_address.php
Lines 82 + 106:
<span class="fa fa-phone"></span><a href="tel:<?php echo nl2br($this->item->telephone); ?>"><?php echo nl2br($this->item->telephone); ?></a>
<span class="fa fa-phone-square"></span><a href="tel:<?php echo nl2br($this->item->mobile); ?>"><?php echo nl2br($this->item->mobile); ?></a>
