![]() On other words, your push enabled iPhone will send/receive bits of data frequently with APNS in order to be ready for any push notification. It is established that push notifications will work either with a data plan (using cellular data) or over WiFi. But what I wanted to know is how the "persistent IP connection" works and how it's translated in data usage on the iPhone and in battery consumption. The notification itself it's a 256bytes of data (at most). I did a bit of research about push notification on iPhone and the best explanatory text is here:īasically, in regard of a iPhone user which activated the push notifications (one or more apps using it, being the same thing), the Apple's APNS server mantains a "persistent IP connection" with your iPhone in order to deliver notifications when the app (Facebook, email, eBuddy a.s.o) needs to 'say' something to you.
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