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# configuration(for:)

Retrieves the RCS configuration for the specified cellular service.

```
final func configuration(for cellularServiceID: CellularServiceID) throws -> RCSService.Configuration
```

## Discussion

You can observe changes in configuration through the [`viabilityNotifications`](/documentation/TelephonyMessagingKit/RCSService/viabilityNotifications) asynchronous sequence.
When the service becomes viable, invoke this method to retrieve updates to the RCS configuration.

---

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