The app declares support for Voice-over IP (VoIP) in the UIBackgroundModes key in your Info.plist, but we are still unable to locate any VoIP services. Apps that declare support for VoIP in the UIBackgroundModes key in your Info.plist file must have features that require VoIP.
My app rejected for VOIP and the app is totally supported video call or call when app is terminated or in background how can. i solve that rejection issue