title: How push notification are delivered to iOS device without wifi and 3g?
body: <p>While in most of the cases devs are complaining about missing notifications, I would like to ask how is it possible to get push notification on iOS device with wifi off and removed sim card. I have iPhone4 without sim card and the device is constantly in airplane mode (wifi off). I do sometimes turn wifi on but there were 3 cases when I have received push notification and double checked wifi was turned off with airplane mode on. </p>
  
  <p>Maybe it's a coincidence, but I have noticed these notification started to appear a month ago. Is it a new iOS feature or it's some hidden mechanism that we could use?</p>