> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/nfc-wallet-sdk-ios/get-started/configuration/4.-push-notifications.md).

# 4. Push notifications

NFC Wallet SDK uses push notifications to deliver digital card updates.

On iOS, implement push delivery using **Firebase Cloud Messaging (FCM)**. FCM uses Apple Push Notification service (APNs) to reach devices.

### What you need to implement

Your **digital wallet application** must:

* Request notification permission and register with APNs.
* Retrieve the FCM registration token.
* Send the token to the NFC Wallet SDK so the NFC Wallet backend can send push notifications to the device.
* Route and process incoming NFC Wallet push notifications.

### In this section

* [Handle push tokens](/nfc-wallet-sdk-ios/get-started/configuration/4.-push-notifications/handle-push-tokens.md)

  Register for push notifications and keep the token in sync.
* [Handle push notifications](/nfc-wallet-sdk-ios/get-started/configuration/4.-push-notifications/handle-push-notifications.md)

  Route and process incoming NFC Wallet push notifications.


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