---
title: viabilityNotifications
framework: TelephonyMessagingKit
role: symbol
role_heading: Instance Property
platforms: [iOS 26.0+]
path: telephonymessagingkit/smsservice/viabilitynotifications
---

# viabilityNotifications

An asynchronous sequence of service viability notifications produced by this service.

## Declaration

```swift
final var viabilityNotifications: some AsyncSequence<SMSService.ViabilityNotification, Never> { get throws }
```

## Discussion

Discussion Use a for-await-in loop to receive SMSService.ViabilityNotification instances from this property.

## See Also

### Determining service viabililty

- [isViable(for:)](telephonymessagingkit/smsservice/isviable(for:).md)
- [SMSService.ViabilityNotification](telephonymessagingkit/smsservice/viabilitynotification.md)