---
title: CTTelephonyNetworkInfo.RadioAccessTechnologyDidChangeMessage
framework: coretelephony
role: symbol
role_heading: Structure
path: coretelephony/cttelephonynetworkinfo/radioaccesstechnologydidchangemessage
---

# CTTelephonyNetworkInfo.RadioAccessTechnologyDidChangeMessage

A message that posts when the radio access technology changes for one of the services.

## Declaration

```swift
struct RadioAccessTechnologyDidChangeMessage
```

## Overview

Overview Use the serviceIdentifier property  as the key in serviceCurrentRadioAccessTechnology to get the value of the new radio access technology for the service.

## Topics

### Instance Properties

- [serviceIdentifier](coretelephony/cttelephonynetworkinfo/radioaccesstechnologydidchangemessage/serviceidentifier.md)

## Relationships

### Conforms To

- [NotificationCenter.AsyncMessage](foundation/notificationcenter/asyncmessage.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)