It was the Firebase/Firestore Library! In summary, the Firebase/Firestore functions are running asynchronously, totally destroying the timing of the APNS delegate functions. Turn Firebase/Firestore off, and APNS works again. We will retrieve the APNS token before any Firebase/Firestore functions are engaged.

I created a new xCode project to test the APNS. Simple code. Here is my output. The token never arrives, whether on cellphone network of Google Fibre. Is there any way Apple can check to see if my device is asking for the APNS token? By the way, I never received any note from the Feedback Assistant case: FB15322637 Application did finish launching Requesting notification permission Notification permission granted Registering for remote notifications

Here is the PHP script that worked: It will save a lot of headaches... [https://www.gridq.com/dev-notes#apns-php-script]

Found the reason this wasn't working... When using the JSON web token (JWT), the certificate file is not needed, only the public key file (AuthKey). Removing the certificate file from the cURL fixed the issue.

More tests: Changing the script to use the AuthKey_M96BF5U2GG as the original .p8 (or if the .pem file was generated without RSA encoding) the file gives this error: curl: (58) Private key does not match the certificate public key

New test: Did a cURL command directly: curl -v -d '{"aps":{"alert":"Test notification"}}' --http2 --cert /home/s1005325/aps.pem --key /home/s1005325/AuthKey_M96BF5U2GG.pem -H "apns-topic: GridQ.com.HeartConnect" -H "authorization: bearer $AUTHENTICATION_TOKEN" -H "apns-push-type: alert" -H "apns-priority: 10" -H "apns-expiration: 0" https://api.sandbox.push.apple.com/3/device/5923f196cadac44cc7a9add6707b4092fb8060c04635a28be8419a59212108e3 Result: Trying 17.188.168.149:443... Connected to api.sandbox.push.apple.com (17.188.168.149) port 443 (#0) ALPN, offering h2 ALPN, offering http/1.1 unable to set private key file: '/home/s1005325/AuthKey_M96BF5U2GG.pem' type PEM Closing connection 0 curl: (58) unable to set private key file: '/home/s1005325/AuthKey_M96BF5U2GG.pem' type PEM Have tested the AuthKey_M96BF5U2GG.pem. It is in a valid RSA format. The permissions and owner are correct. The .p8 file it was generated from worked to connect to APN from the command line.