title: Is Apple's push notification service reliable?
body: <p>I have an iOS app using push notification but once in a while I'm not getting a notification on my device when I expect to receive one. I would receive all the subsequent notifications. I confirmed with my backend to make sure that all the notifications were sent successfully.</p>
  
  <p>So my question is: is APNs <em>nearly</em> 100% reliable or should I just expect to miss some notifications here and there because of intermittent 3G/wifi connection?</p>
  
  <p>I would think that APNs works as a queueing system and retry if it wasn't successful within the first few times.</p>