<!--
{
  "availability" : [
    "iOS: 10.0.0 -",
    "iPadOS: 10.0.0 -",
    "macCatalyst: 10.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 9.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CallKit",
  "identifier" : "/documentation/CallKit/CXErrorCodeRequestTransactionError-swift.struct/Code/unknownCallProvider",
  "metadataVersion" : "0.1.0",
  "role" : "Case",
  "symbol" : {
    "kind" : "Case",
    "modules" : [
      "CallKit"
    ],
    "preciseIdentifier" : "c:@E@CXErrorCodeRequestTransactionError@CXErrorCodeRequestTransactionErrorUnknownCallProvider"
  },
  "title" : "CXErrorCodeRequestTransactionError.Code.unknownCallProvider"
}
-->

# CXErrorCodeRequestTransactionError.Code.unknownCallProvider

The controller couldn’t find a call provider to perform the actions in the requested transaction.

```
case unknownCallProvider
```

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)