While setting up a new SharePoint site we came across an issue with one of the themes where the web parts don’t allow the tel:// protocol input. When adding a button the web part would only allow https:// and mailto:// protocols for some reason. The tel:// protocol was not allowed.

So a work around without creating a custom web part:

• Create a new page on a public hosted site called. /dial.php
• Paste the following code:
• <?php

  if(isset($_GET[‘tel’])){

  echo’Dailing…’;

  header(“Location: tel://”.$_GET[‘tel’]);

  exit();

  }

  ?>
• Save and upload

Now if you were to go to this url www.yourwebsite.co.uk/dial.php?tel=07865142628

This would trigger the tel: protocol to dial the users phone from within SharePoint.

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