title: Amazon sns (push notification) does not send to IOS application
body: <p>Recently the app can not receive notification, the android side works fine but the ios one has fail</p>
  
  <p>so here is what I have attempt:</p>
  
  <pre><code>1) generate token from apple apn service
  2) create the endpoint at amazon backend
  3) publish the message at amazon backend
  4) it does not receive message and the endpoint will go to disabled after a while.
  </code></pre>
  
  <p>And I have checked the following:</p>
  
  <pre><code>1) try serveal ios device , including iphone/ ipad/ipod touch also the same result
  2) checked the secret key/ platform arn it is matched
  3) created another platform ARN but still the same.
  </code></pre>
  
  <p>So , what direction should I continue to debug , e.g. is the push notification cert ? which part of coding should I check, as it works before but only fail recently. </p>
  
  <p>Thanks a lot.  </p>