The log is from our server log, no clue about the user devices. I can understand your explanation. So two questions here. Why and when will a device be offline? How to avoid it? We saw a peak of "disorderred notification" on the iOS 26.4+. I don't know if there is a change or an issue here. btw, I posted the apns-id above, are they helpful?

Hi, Kevin I updated my iOS to 26.4.2, then it works fine: iPhone17(iOS 26.4.2) goes to the new method. iPhone12PM (iOS 18.7.2) goes to the old method. Then I can continue my test. btw, I have another question about the APNs on iOS26.4 in the thread: https://developer.apple.com/forums/thread/823102 The APNs delay to send notification on iOS 26.4 Please help to check or ask other dev to check. Thanks.

Knock knock?

Any update? Apple dev?

Feedback id: FB22528150

Here are detailed info. # server log: #stop-ring "@timestamp": ["2026-04-09T14:54:47.704Z"], "apns_topic":"com.glip.mobile" "device_token":"86693487CCF6217018D112FFE7898A6C6C52115116B89FE254FCEC43A399647E" "apns_id":"40779e9b-8878-4861-9dcb-86f31fb66f1e" "status_code":"success" #start-ring "@timestamp": ["2026-04-09T14:54:43.315Z"], "apns_topic":"com.glip.mobile.voip" "device_token":"44EB6B069D877957908626E4978B32F798344DDEAD03961E4A8EFA0BBE9FB2EE" "apns_id":"7c4e863a-5aab-44cb-8739-2e3868fc7560" "status_code":"success" # clent app log (CDT time) #receive stop ring 2026-04-0909:54:48.858 CDT : INFO : [RcRtc] [0x1feeba1c0] [PushNotificationParser]call push notification handled. action: StopRing telephony session id: s-a0dd8601926c7z19d72bbf8b9z1e62ec10000 sid: 178503189447188 # receive start ring. 2026-04-0909:54:49.524 CDT : INFO : [RcRtc] [0x1feeba1c0] [PushNotificationParser]call push notification handled. action: StartRing telephony session id: s-a0dd8601926c7z19d72bbf8b9z1e62ec10000 sid: 178503189447188 btw, I found a similar thread here, maybe related? https://developer.apple.com/forums/thread/820550 iCloud Sync not working with iPhone, works fine for Mac.

Thank you very much Kevin.Elliott for your details. I will gather these system behaviours as an FAQ list for our users. btw, the "Prevent Lock to End Call" toggle bothers me a lot too. LOL

The background like: We have a VoIP app with more call features. Sometimes, we received some feedbacks about "call ened". After checking the log file, it shows there are user actions (eg, from func provider(_ provider: CXProvider, perform action: CXEndCallAction)), But the user said no user actions. So we doubt if there is a system-level event or error that will end this call. Then the details of the end call reason would be very helpful for debugging.

OK, I saw the difference. But we still can not know the user action type from this method. func provider(_ provider: CXProvider, perform action: CXEndCallAction) There is no option like actionType to know it is triggered by the CallKit screen / Hardware / unknown. Then we can know the details.

Thanks for your reply. But if the user taps any hardware to trigger an action, the app will receive it then the app will create a CXAction to the CallKit, here the app will print the calling of for this method: open func request(_ transaction: CXTransaction) async throws But there is no such log, so we can make sure there is no user action, but directly from the system: func provider(_ provider: CXProvider, perform action: CXEndCallAction) {

demo project: https://github.com/willbin/TestKeyboard screenshot:

@apple Can you help on this?

@apple Can you help on this?

@DTS Engineer I tested this case with iOS26, it works well. So you guys fixed it in iOS26?

Thanks for your info. My app is a VoIP app that can provide emergency calls via VoIP. Now I want to do this when the user dials an emergency call in my app: If the iPhone has a SIM card, then route this emergency call to the Native dialer. If the iPhone has NO SIM card, or this is an iPad, then I can make this emergency call via our VoIP server. I know in the US/CA/AU, the iPhone can make emergency calls via the native Phone app even no SIM card inserted. But for other countries, we can not make sure. So I checked serviceCurrentRadioAccessTechnology solution, it seems word well after my testing. Can I use this to check the SIM card status.?