title: React native -- call phone number with extension
body: <p>I am trying to open phone number with extension.
  Linking works with just phone number</p>
  
  <p>Tried with few options</p>
  
  <pre><code>Linking.openURL('tel:XXXXXXXXX,XXX');
  
  Linking.openURL('tel:'+ encodeURIComponent('XXXXXXXXX,XXX'));
  </code></pre>
  
  <p>Dialer only dials primary number and doesnt include extension</p>
  
  <p>I could write a native code and expose the method, but that would be my last option</p>