title: How to add whatsapp like options to contact whenever the is a new contact added to Contacts
body: <p>I develop an app which needs to do 2 things:</p>
  
  <ul>
  <li>Create a user account (like WhatsApp).</li>
  <li>Whenever there is a new contact entry, if the contact is using my app, then immediately in the Contacts application show options "call" or "message" in the contact detail page. </li>
  </ul>
  
  <p><a href="https://i.stack.imgur.com/xibAK.png" rel="noreferrer">Example</a></p>