title: Does push notification token changes after application update?
body: <p>I am asking about two situations:</p>
  
  <p><strong>1)</strong> After we do a regular update from the App Store</p>
  
  <p><strong>2)</strong> After we simulate an update, by downloading a current version from a Store and installing &amp; running a new version from within Xcode,</p>
  
  <p>does push notification token changes? If changes, how often eg. each time, or from time to time?</p>
  
  <p>I ask this, because I was doing some testing, where I want to preserve Documents folder after an update. So this can be easily done like I described above, by downloading the app from the Store, and running a new version from within Xcode. But, I noticed that push notifications stopped to work. Then I repeated this few times (uninstall the app, install it from the store, then run the upgraded version from Xcode) and every time push notifications worked.</p>
  
  <p>I wonder if this was due to push notification token change? </p>