Push notification not receiving on iphone

Question

I am using this tutorial to learn push notification.

Answer 1

Implement the feedback service on server side and also check on server side that within how much duration all the device token are send to APNS. From feedback service atleast u will come to know that how much devices had received ur notification. If all the device token are send one by one to the APNs and the APNs does'nt send any list through feedback service then u cannot handle the duration to receive notification on devices.