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We are using Flutter for our mobile app and also using nodeJS for Backend . In our app login is handled by AWS Amplify and for sending notification we are using Amazon Pinpoint and FCM for Android. For sending notifications to ios devices we tried with Amazon Pinpoint and APNS but the notifications received were not triggering the callback to take action on the notification, so for sending notification to ios we started directly using firebase admin to trigger notifications using FCM .Everything is working fine in debug mode of the app but notifications are not coming in the release mode for ios.We receive internal server error from FCM with message endpoint not regisiterd .

We tried giving priority to the notifcations but that didn't work

Gaurav Sharma
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  • For messaging to work when your app is built for production, you must create a new App Identifier which is linked to the application that you're developing. [Registering an App identifier](https://firebase.flutter.dev/docs/messaging/apple-integration#2-registering-an-app-identifier) – Soliev Nov 10 '22 at 06:02

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