A service type for VoIP traffic.
- iOS 4.0–13.0Deprecated
- macOS 10.7–10.15Deprecated
- Mac Catalyst 13.0–13.0Deprecated
- tvOS 9.0–13.0Deprecated
- watchOS 2.0–6.0Deprecated
With the VoIP service type, the kernel continues to listen for incoming traffic while your app is in the background, then wakes up your app whenever new data arrives. This should be used only for connections that are used to communicate with a VoIP service.