<!--
{
  "availability" : [
    "iOS: 7.0.0 -",
    "iPadOS: 7.0.0 -"
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  "documentType" : "symbol",
  "framework" : "CoreTelephony",
  "identifier" : "/documentation/CoreTelephony/CTSubscriber",
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  "role" : "Class",
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    "kind" : "Class",
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      "Core Telephony"
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    "preciseIdentifier" : "c:objc(cs)CTSubscriber"
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  "title" : "CTSubscriber"
}
-->

# CTSubscriber

A cellular network subscriber.

```
class CTSubscriber
```

## Topics

### Identifying the subscriber

[`identifier`](/documentation/CoreTelephony/CTSubscriber/identifier)

An implementation-defined identifier used to correlate this subscriber with information vended by other APIs.

### Working with a delegate

[`delegate`](/documentation/CoreTelephony/CTSubscriber/delegate)

A delegate that receives updates on the subscriber information.

### Managing the carrier token

[`carrierToken`](/documentation/CoreTelephony/CTSubscriber/carrierToken)

A data object containing authorization information about the subscriber.

[`-  refreshCarrierToken`](/documentation/CoreTelephony/CTSubscriber/refreshCarrierToken())

Attempts to refresh the carrier token.

[`CTSubscriberTokenRefreshed`](/documentation/CoreTelephony/CTSubscriberTokenRefreshed)

The name of the notification indicating that the carrier token is available.

### Detecting a SIM

[`SIMInserted`](/documentation/CoreTelephony/CTSubscriber/isSIMInserted)

A Boolean property that indicates whether a SIM is present.

## Relationships

### Conforms To

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`CVarArg`](/documentation/Swift/CVarArg)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`Hashable`](/documentation/Swift/Hashable)

[`Equatable`](/documentation/Swift/Equatable)

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

---

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