title: How can I make an <a href> only active on mobile devices?
body: <p>I want to add this code to make the contact details on my website automatically jump into a mobile dialpad/address book when clicked:</p>
  
  <pre><code>&lt;a href="tel:12345555555"&gt;Call Us Now&lt;/a&gt;
  </code></pre>
  
  <p>How can I make it appear as plain text for non-telephone devices (computers, tablets, laptops) so that it doesn't return a 404 error and cannot be clicked?</p>
  
  <p>Happy to use any combination of HTML/CSS/JS to achieve this.</p>