We added silent notifications which require PushKit and enabling VoIP in the Info.plist
See Apple\'s PushKit Doc
Now my app is rejected by Apple:
Update on the resolution -
We installed a third party VoIP solution and implemented VoIP calls in our app. Awkward to be forced to add a feature but in our case it was right for our app.
In iTunesConnect submission page, under "App Review Information" "Notes" I had to state that we added a new feature VoIP calls, with steps to test VoIP calls. This caught the reviewers attention to the new VoIP call feature and the app passed.
When I added the new feature under "whats new in this version", the app continued to get rejected.