title: Refresh device registration with Azure Notification Hub (device SDK)
body: <p>I remembered during the Notification Hub preview, we used to call the method <code>RefreshRegistration</code> (or something similar, presumably there's different flavour of this on different device SDK), so that the device registration get refreshed in the notification hub, and not automatically removed after 90 days.</p>
  
  <p>In the GA version of Notification Hub devices SDK, I can't find the this method anymore. A few questions I hope experts in the Notification Hub can help:</p>
  
  <ol>
  <li>Is the reason behind the missing <code>RefreshRegistration</code> method, means that we no longer need to call a different function, instead, we should always call the 'regular' version of registration (e.g. RegisterTemplate/RegisterNavite, etc.) every time?</li>
  <li>What is the best practice on calling the registration (to Notification Hub) method? Should we make a registration call on every launch of the mobile app? </li>
  </ol>