New answers tagged push
When you disable all notifications for a specific app (alerts,badges, etc) you also disable "push" so data will only be received when you open the app. I verified this with whatsapp.
The notifications come through 99.9%, I think the 0.01% is when your phone doesn't have network. That is the only reason it won't go through, unless you have a poor server with 10000 requests per second then yes that will fail. So for best results just get a good server. I don't think you can help people with cellular coverage. Even if you did run in ...
There is no push for mail settings for iPhone 5
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