---
title: TelephonyMessagingSession.Error.serviceUnavailable
framework: TelephonyMessagingKit
role: symbol
role_heading: Case
platforms: [iOS 26.0+]
path: telephonymessagingkit/telephonymessagingsession/error/serviceunavailable
---

# TelephonyMessagingSession.Error.serviceUnavailable

The service is unavailable.

## Declaration

```swift
case serviceUnavailable
```

## See Also

### Inspecting errors

- [TelephonyMessagingSession.Error.invalidSession](telephonymessagingkit/telephonymessagingsession/error/invalidsession.md)
- [TelephonyMessagingSession.Error.invalidArgument](telephonymessagingkit/telephonymessagingsession/error/invalidargument.md)
- [TelephonyMessagingSession.Error.internalError](telephonymessagingkit/telephonymessagingsession/error/internalerror.md)