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After upgrading my app to Xcode8/Swift 3, I no longer receive callbacks from the PKPushRegistryDelegate .

I have verified all steps in Apple´s Voice Over IP (VoIP) Best Practices .

My device logs the following that might be related:

callservicesd[92] : [WARN] Ignoring voipRegister request because either no bundleIdentifier could be determined (0) or no environment could be determined (1)

My AppDelegate:

var voipRegistry: PKPushRegistry!
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
  voipRegistry = PKPushRegistry(queue: DispatchQueue.main)    
  voipRegistry.delegate = self    
  voipRegistry.desiredPushTypes = Set([.voIP])    
extension AppDelegate: PKPushRegistryDelegate {    
    func pushRegistry(_ registry: PKPushRegistry, didInvalidatePushTokenForType type: PKPushType) {        
        print("didInvalidatePushTokenForType")        
    func pushRegistry(_ registry: PKPushRegistry, didReceiveIncomingPushWith payload: PKPushPayload, forType type: PKPushType) {        
        print("Incoming voip notfication: \(payload.dictionaryPayload)")
    func pushRegistry(_ registry: PKPushRegistry, didUpdate credentials: PKPushCredentials, forType type: PKPushType) {               
        print("voip token: \(credentials.token)")        
        
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