iOS App terminated by Watchdog (Signal 9) in Background state despite reporting call Description I have successfully implemented VoIP pushes for the Killed state, where CallKit triggers correctly. However, when the app is in the Background state (suspended), it consistently crashes with an NSInternalInconsistencyException. The app process is killed by the iOS Watchdog because it fails to satisfy the requirement of posting an incoming call in the same run loop as the push receipt, or the completion handler is not being released fast enough by the JS bridge. Environment React Native Version: .78 React Native CallKeep Version: 4.3.14 React Native VoIP Push Notification Version: 3.3.3 iOS Version: 18.x Device: Physical iPhone [iphone 13 pro] The Issue When a VoIP push arrives while the app is in the Background: pushRegistry:didReceiveIncomingPushWithPayload: is called. RNCallKeep.reportNewIncomingCall is triggered on the Main Thread. The app is terminated by the system before the CallKit UI is fully established or before the completion() closure is executed. Current Implementation (AppDelegate.swift) func pushRegistry(_ registry: PKPushRegistry, didReceiveIncomingPushWith payload: PKPushPayload, for type: PKPushType, completion: @escaping () -> Void) { let payloadDict = payload.dictionaryPayload let callerName = payloadDict["callerName"] as? String ?? "Unknown Caller" let callUUIDString = payloadDict["uuid"] as? String ?? UUID().uuidString let userGUID = payloadDict["guid"] as? String ?? "0" RNCallKeep.reportNewIncomingCall( callUUIDString, handle: userGUID, handleType: "generic", hasVideo: false, localizedCallerName: callerName, supportsHolding: true, supportsDTMF: true, supportsGrouping: true, supportsUngrouping: true, fromPushKit: true, payload: ["userGuid": userGUID], withCompletionHandler: { } ) RNVoipPushNotificationManager.didReceiveIncomingPush(with: payload, forType: type.rawValue) completion() } Logs Exception Type: EXC_CRASH (SIGKILL) Exception Note: EXC_CORPSE_NOTIFY Termination Reason: TCC 1 | [CoreFoundation] Killing app because it never posted an incoming call to the system after receiving a PushKit VoIP push. Observed Behavior Killed State: Works perfectly. Foreground State: Works perfectly. Background State: The phone may vibrate once, but the app process is killed before the CallKit UI appears. Questions/Suspected Causes Is RNVoipPushNotificationManager.addCompletionHandler causing a delay in the background run loop that triggers the Watchdog? Should completion() be called immediately in Swift for the Background state, rather than waiting for VoipPushNotification.onVoipNotificationCompleted in JS? Is there a known issue with RNCallKeep not being able to present the UI while the app is in a suspended background state?

Hello, We're seeing a high rate of providerDidReset callbacks in production across a large user base (iOS 16, 17, 18, and 26). I'd like to understand both the correct way to handle this delegate method and strategies to reduce its frequency. Background The callback occurs across all iOS versions we support and is not isolated to a specific device or region. The callback can occur in any app state (foreground, background, inactive), however it is most dominant in the background state — particularly during VoIP push notification handling. The callback is more prevalent during long app sessions — for example, when the app has been running continuously for a day or overnight. We do not call CXProvider.invalidate() anywhere in our codebase explicitly. After providerDidReset fires, subsequent transactions fail with CXErrorCodeRequestTransactionErrorUnknownCallUUID (error code 4). Re-initializing the provider via initializeProvider() resolves this error. Our Implementation We use a singleton proxy class (CallKitProxy) that owns the CXProvider. Below is a simplified version — some logging and non-essential parts have been removed for brevity. @objcMembers public final class CallKitProxy: NSObject { private var cxProvider: CXProvider? private let cxCallController: CXCallController private let cxCallObserver: CXCallObserver private override init() { cxCallObserver = CXCallObserver() cxCallController = CXCallController() super.init() initializeProvider() cxCallObserver.setDelegate(self, queue: nil) } private func initializeProvider() { let configuration = providerConfiguration() cxProvider = CXProvider(configuration: configuration) cxProvider?.setDelegate(self, queue: nil) } private func providerConfiguration() -> CXProviderConfiguration { let soundName = SharedUDHelper.shared.string(forKey: .pushNotificationSoundNameForCall) let sound = CallNotificationSounds(name: soundName ?? "ringtoneDefault") let configuration = CXProviderConfiguration() configuration.supportsVideo = true configuration.maximumCallsPerCallGroup = 1 configuration.maximumCallGroups = 1 configuration.supportedHandleTypes = [.phoneNumber, .generic] configuration.iconTemplateImageData = UIImage( named: "callkit_mask", in: .main, compatibleWith: nil )?.pngData() configuration.ringtoneSound = sound.name return configuration } public func requestTransaction( action: CXCallAction, completion: @escaping (Error?) -> Void ) { let transaction = CXTransaction(action: action) cxCallController.request(transaction) { error in completion(error) } } } extension CallKitProxy: CXProviderDelegate { public func providerDidReset(_ provider: CXProvider) { // End any active calls, then re-initialize the provider initializeProvider() } } Questions 1. Is re-initializing the provider inside providerDidReset the correct approach? The documentation states that providerDidReset signals the provider has been reset and all calls should be considered terminated. Should we be calling CXProvider.invalidate() on the old instance before creating a new one? Or is assigning a new CXProvider to cxProvider (which releases the old instance) sufficient? 2. What could be causing providerDidReset to fire so frequently, and how can we reduce it? We're particularly concerned about cases triggered during VoIP push handling in the background and inactive states. Are there known conditions — such as provider configuration changes, app lifecycle events, or system memory pressure — that commonly trigger this callback? And are there any recommended patterns to make the provider more resilient in these scenarios? Thank you.

Hello everyone, I’m an iOS developer working on a real-time communication app that supports VoIP calls using CallKit. The app has been in production for more than 5 years. Over the years, some users have occasionally reported that they do not receive incoming call pushes. We have tried multiple optimizations on both the client and server side, but the improvement has been limited. From Apple documentation and discussions online, I understand that iOS may restrict VoIP pushes if the system detects violations of VoIP push usage rules (for example, not presenting a CallKit call after receiving a VoIP push). However, the exact rules and thresholds for these violations are not clearly documented, so I’d like to ask a few questions to better understand the expected behavior. Below is a simplified description of our current call flow. Call Flow Caller When the user initiates a call: We do not use CallKit The call is handled entirely using a custom in-app call UI Callee When the user receives a call: Device locked or app in background A VoIP push wakes the app The app presents the CallKit incoming call UI App in foreground The server still sends a VoIP push The app first reports the call to CallKit After a very short delay, the app programmatically ends the CallKit call Then a custom in-app call UI is presented via the app's long connection The reason we always send a VoIP push (even when the app is in the foreground) is that we want to maximize call delivery reliability.

Hello, I’m implementing VoIP calling in an iOS application using PushKit (VoIP pushes) together with CallKit. The standard call flow works correctly: Happy scenario User A initiates a call. Server sends a VoIP push to User B. User B’s device receives the push and reports the incoming call using CallKit. User B answers the call. However, I would like clarification about non-happy scenarios and when it is acceptable to use VoIP pushes to update or stop a CallKit ringing state. Apple documentation warns that VoIP pushes must be used only when they result in a call-related action, so I want to ensure the following cases are compliant. Scenario A — Caller Cancels Before Answer User A calls User B. Server sends a VoIP push to User B. User B’s device starts ringing via CallKit. Before User B answers, User A cancels the call. Question: Is it acceptable to send another VoIP push to User B indicating that the call has been cancelled so the device can: stop the CallKit ringing UI end the call optionally mark it as missed or cancelled Or should this state change be handled using a regular remote push or another signaling mechanism instead of VoIP push? Scenario B — Callee Rejects the Call User B rejects the call from CallKit. The server must inform User A that the call was rejected. Question: Is it acceptable to send a VoIP push to User A to update the CallKit state and terminate the outgoing call UI? Scenario C — Multiple Devices per User User B may be logged in on multiple devices. User A calls User B. VoIP push is sent to all devices of User B. One device answers. Question: Is it acceptable to send a VoIP push to the remaining devices instructing them to: stop ringing end the CallKit incoming call UI Or is there a recommended alternative pattern for this case? Main Question Aside from the initial incoming call VoIP push, in which situations is it considered acceptable to send additional VoIP pushes to terminate or update CallKit state (cancelled, rejected, answered on another device)? The goal is to remain compliant with PushKit policies, particularly the guidance that VoIP pushes should only be used when they result in a call-related user action. Any guidance on the recommended architecture for these cases would be greatly appreciated. Thank you.

token：eb3b63ab94b136f6d25a86d48bb4b7ff20377e393f137cb4f43b17560112bf51 msgId：67d4c88d-61b1-4f51-df0b-2efa022fd672 机型：iPhone7 系统：iOS 15.8.3 问题描述：后端服务器调用苹果提供的pushKit推送API且已成功返回上述msgId，客户端App也已经实现对应的CallKit方法reportNewIncomingCall，但没有收到对应的推送，这是什么原因呢？

We have an iPhone app with a companion watchOS app for factory alert monitoring. What we want to achieve is: each server event is an independent event, not just a latest-state update events should not be dropped in some scenarios, new events may arrive as frequently as once per minute the watch app state/UI should reflect the event almost in real time our target is roughly within 5 seconds the watch app is expected to be opened by the user when they want to confirm details, but we want the data to already be there even if the watch app was previously in the background notification mirroring is already sufficient for immediate user awareness; the question is about reliable background data/state delivery to the watch app Our current architecture is: The server sends APNs pushes to the iPhone app. We use both: alert pushes for user-visible notifications background pushes (content-available: 1, apns-push-type: background, apns-priority: 5) for background data delivery When the iPhone app receives the push, it relays data to the watch using WatchConnectivity. On the iPhone/watch side: we use sendMessage when reachable / foreground-like communication is possible we use transferUserInfo as the background / unreachable fallback The devices are paired and connected, and the apps are not force-quit. In practice, the behavior is not stable enough for this requirement: some background deliveries are delayed some relays to the watch are not timely the end-to-end behavior is not reliable enough for independent event delivery with near-real-time expectations My understanding is that: APNs background pushes are not guaranteed and may be throttled WatchConnectivity background delivery is opportunistic immediate WC messaging depends on reachability / active state So the main question is not how to debug a single implementation issue, but whether our expectation is valid at all on Apple platforms. Questions: Is this architecture fundamentally unsuitable if the requirement is lossless, near-real-time event delivery from server -> iPhone -> watch, with a target of roughly within 5 seconds? Even if the implementation is correct, should we expect iPhone background push + WatchConnectivity relay to remain inherently non-deterministic for this kind of requirement, especially in scenarios where events may occur approximately once per minute? If notification mirroring is used only for user awareness, but the watch app still needs reliable background state/data delivery before the user opens it, is there any Apple-supported architecture for that? Would direct delivery to the watch app be the only realistic direction, or is this level of reliability/latency simply not a supported expectation for general-purpose apps? We understand that background execution and delivery are managed opportunistically by the system. What I want to confirm is whether this requirement itself is outside the practical/supported envelope of APNs background push + WatchConnectivity relay.

Hello! I’m building a VoIP app for iPhone and Apple Watch using PushKit and CallKit. I’m trying to understand the recommended watchOS architecture for this kind of setup. What we would like is for the watch to behave as an endpoint for incoming calls, so that when a call comes in the user can answer on either the iPhone or the watch. My understanding is that VoIP notifications are not supported on watchOS, so for incoming calls what we ended up having to do was send the watch a regular APNs alert notification and only start the actual call setup after the user interacts with it. This isn’t ideal, and the notification often appears a few seconds late. What we would like to be able to do is present the incoming call on the watch more like how FaceTime calls appear on Apple Watch. So I wanted to ask whether this is the intended pattern for a companion watchOS VoIP app. Is using a regular APNs alert notification the correct way to surface an incoming call on the watch, or is there a better supported approach? Thanks!

I have a VoIP app, now try to implement the new method which support the "PKVoIPPushMetadata" in iOS 26.4. Code as below: /// iOS 26.4+ (SDK with `PKVoIPPushMetadata`): prefer this path for VoIP per Apple; completion is `@Sendable` on supported SDKs. @available(iOS 26.4, *) func pushRegistry(_ registry: PKPushRegistry, didReceiveIncomingVoIPPushWith payload: PKPushPayload, metadata: PKVoIPPushMetadata, withCompletionHandler completion: @escaping @Sendable () -> Void) { print("willtest: didReceiveIncomingVoIPPushWith: metadata=\(metadata)") handleVoIPPush(payload: payload, metadataMustReport: metadata.mustReport, completion: completion) } func pushRegistry(_ registry: PKPushRegistry, didReceiveIncomingPushWith payload: PKPushPayload, for type: PKPushType, completion: @escaping () -> Void) { print("willtest: didReceiveIncomingPushWith: PKPushType=\(type)") handleVoIPPush(payload: payload, metadataMustReport: nil, completion: completion) } But the voip push only goes to the old method on my iOS26.4 device(iPhone17). And it will go to the new method after I delete the old method. So how can I use this method in my app? I must support iOS16+ versions.