---
title: CTServiceRadioAccessTechnologyDidChange
framework: foundation
role: symbol
role_heading: Type Property
path: foundation/nsnotification/name-swift.struct/ctserviceradioaccesstechnologydidchange
---

# CTServiceRadioAccessTechnologyDidChange

A notification that posts when radio access technology changes.

## Declaration

```swift
static let CTServiceRadioAccessTechnologyDidChange: NSNotification.Name
```

## Discussion

Discussion The notification’s object is a string that represents the identifier of the service with changes to its radio access technology.  Use this identifier as the key in serviceCurrentRadioAccessTechnology to get the value of the new radio access technology for the service.

## See Also

### Core Telephony

- [CTRadioAccessTechnologyDidChange](foundation/nsnotification/name-swift.struct/ctradioaccesstechnologydidchange.md)