Twilio Voice SDK iOS 6.13.6

6.13.6

• Programmable Voice iOS SDK 6.13.6 [XCFramework] (checksum: 4e04fa2698e33a47d15293f4437b1416fccad29c6e168695295c090c661d8acb
  ).
• Programmable Voice iOS SDK 6.13.6 [Static-XCFramework] (checksum: cf318d7590fcd4dfbe52be5fc34cbc9da3f8661e0d9a93714c51a379fee1dc8e
  )

Bug Fixes

• Fixed an issue where the SDK was accessing AVAudioSession properties inside the route-change notification handler and caused resource competition that could result in main-thread unresponsiveness.

Size Impact for 6.13.6

Dynamic:

Architecture	Compressed Size	Uncompressed App Size
arm64	3.8 MB	8.4 MB

• The app size is calculated by importing the TwilioVoice SDK into a bare-bones app.

Static:

Architecture	Compressed Size	Uncompressed App Size
arm64	4.5 MB	10.5 MB

• The app size is calculated by importing the TwilioVoice SDK into a bare-bones app.

Twilio Voice SDK iOS 6.13.5

6.13.5

• Programmable Voice iOS SDK 6.13.5 [XCFramework] (checksum: 08fd9f33ea940864d390b7a338156b8c2daa69d8c5f200bc9e0ce8f8e54d45e6).
• Programmable Voice iOS SDK 6.13.5 [Static-XCFramework] (checksum: a2f476e9935ab60fc2d314aae6c58dbd0f0ebaee85e258990e83e8c762bfa32b)

Enhancements

• The Voice iOS SDK is built with Xcode 16.4.0.

Bug Fixes

• Fixed a crash when the SDK receives the Call Invite cancellation event while the TVOCallInvite object from the [TVONotificationDelegate callInviteReceived:] callback has been released. Note that the application is responsible for keeping the TVOCallInvite object alive for the underlying signaling connection to finish its tasks and only release the object when the Call Invite has been accepted, rejected or when the Call Invite is canceled.

Size Impact for 6.13.5

Dynamic:

Architecture	Compressed Size	Uncompressed App Size
arm64	3.8 MB	8.4 MB

• The app size is calculated by importing the TwilioVoice SDK into a bare-bones app.

Static:

Architecture	Compressed Size	Uncompressed App Size
arm64	4.5 MB	10.5 MB

• The app size is calculated by importing the TwilioVoice SDK into a bare-bones app.

Twilio Voice SDK iOS 6.13.4

6.13.4

• Programmable Voice iOS SDK 6.13.4 [XCFramework] (checksum: b3a09755761109935806be8a988d647ebb729494bef23c0b4aa793f989b42af5).
• Programmable Voice iOS SDK 6.13.4 [Static-XCFramework] (checksum: df03cf6ab7cb2b491691d3a2e981bb5ef0c752a7363117ea3e33e906693a18e6)

API Changes

• The [TVOPreflightDelegate preflight:didCompleteWitReport:] is now [TVOPreflightDelegate preflight:didCompleteWithReport:]. The Swift name remains unchanged.
• The [TVOPreflightReport dictionaryReport] now returns the value of callQuality in string literals, i.e. Excellent, Great, Good, Fair and Degraded.
• The [TVOPreflightReport dictionaryReport] now returns the value of isTurnRequired in true boolean values instead of true or false strings.
• The [TVOPreflightReport dictionaryReport] now returns an empty array if there is no value in the warnings or warningsCleared field.

Bug Fixes

• Fixed a crash when the SDK receives the Call Invite cancellation event.
• Fixed a crash when the SDK is publishing Voice Insights events with invalid dictionary entries.

Size Impact for 6.13.4

Dynamic:

Architecture	Compressed Size	Uncompressed Size
arm64	3.8 MB	8.6 MB

Static:

Architecture	Compressed Size	Uncompressed Size
arm64	4.5 MB	10.5 MB

Twilio Voice SDK iOS 6.13.3

August 25, 2025

• Programmable Voice iOS SDK 6.13.3 [XCFramework] (checksum: d9b041dbebdb2aaa9e0d1a61503f076136118702e4dafd6e538b6e5ee6fe4382).
• Programmable Voice iOS SDK 6.13.3 [Static-XCFramework] (checksum: ae8b9a0a24a7732bdc1cf1af0f781898b0c50d3e1ace362369e47a33f4e88b14)

Enhancements

• The AVAudioSession option AVAudioSessionCategoryOptionAllowBluetooth in TVODefaultAudioDevice.h is deprecated and replaced with AVAudioSessionCategoryOptionAllowBluetoothHFP when building on Xcode 26.

Size Impact for 6.13.3

Dynamic:

Architecture	Compressed Size	Uncompressed Size
arm64	3.8 MB	8.6 MB

Static:

Architecture	Compressed Size	Uncompressed Size
arm64	4.5 MB	10.5 MB

Twilio Voice SDK iOS 6.13.2

June 18, 2025

• Programmable Voice iOS SDK 6.13.2 [XCFramework] (checksum: e04b4790ebe35b8e66291d503ed2570dd6181d85dd4ab1f60b3c8ec2e0a571b1).
• Programmable Voice iOS SDK 6.13.2 [Static-XCFramework] (checksum: c25d14bd4b7c46c0d9f6caca2e80ad53cba95fd6f37d2043ccc97bd04cda5aa1)

Enhancements

• The SDK is now also available in the static XCFramework format. To add the static library to your iOS app, follow these steps:
  1. Extract TwilioVoice.xcframework from TwilioVoice-static.xcframework.zip and drag and drop it into your Xcode project.
  2. In Frameworks, Libraries, and Embedded Content, add SystemConfiguration.framework.
  3. Add @import TwilioVoice; to your source files.
• The minimum supported iOS deployment target for the Twilio Voice SDK is now set to iOS 12.0. This version was built with Xcode 15.3.0.

Size Impact

Dynamic:

Architecture	Compressed Size	Uncompressed Size
arm64	3.8 MB	8.6 MB

Static:

Architecture	Compressed Size	Uncompressed Size
arm64	4.5 MB	10.5 MB

Twilio Voice SDK iOS 6.13.1

May 12, 2025

• Programmable Voice iOS SDK 6.13.1 [XCFramework] (checksum: c0216f0a35de40bb7bd8528afbfff5628c1fb0dbfd91333a37b61a348a7aa9d2).

Bug Fixes

• Fixed an issue where exception is raised when assigning audio device instance to the Voice SDK immediately after the previous call has ended.
• The Swift API name of the TVOPreflightCallQuality enum has been renamed as PreflightReport.CallQuality to match the namespace.

Size Impact

Architecture	Compressed Size	Uncompressed Size
arm64	3.8 MB	8.5 MB

Twilio Voice SDK iOS 6.13.0

January 22, 2025

• Programmable Voice iOS SDK 6.13.0 [XCFramework] (checksum: 2e296d64f51962b807a250d27aadf8ba2710218edd93f9b3bf2cb73cde4fbfdb).

Enhancements

• This release is based on Chromium WebRTC 124.
• The internal default audio device is now created and destroyed on the correct thread.

Size Impact

Architecture	Compressed Size	Uncompressed Size
arm64	3.8 MB	8.5 MB

Twilio Voice SDK iOS 6.12.1

December 3, 2024

• Programmable Voice iOS SDK 6.12.1 [XCFramework] (checksum: f74b41d69451461e4fe0a4bc48eeb6d2e469d0c13175e5abbee3a38926eb4acd).

Bug Fixes

• Fixed a bug where callSid is missing from the dictionary returned by [TVOPreflightTest dictionaryReport].
• Fixed a bug where the signaling library was throwing an exception while initiating a call with per-app based VPN enabled.
• Fixed the TVOPreflightCallQuality enum Swift name alias typo.

Size Impact

Architecture	Compressed Size	Uncompressed Size
arm64	3.4 MB	7.8 MB

Twilio Voice SDK iOS 6.12.0

October 21, 2024

• Programmable Voice iOS SDK 6.12.0 [XCFramework] (checksum: fb8e743bba78df579814a5860bbea8cde9dd3cedd137df85f97be7cafb5adfc8).

API Changes

• New methods [TwilioVoiceSDK runPreflightTestWithAccessToken:delegate:] and [TwilioVoiceSDK runPreflightTestWithOptions:delegate:]
  to run a preflight test are added.
• A new class TVOPreflightOptions is added. Use [TVOPreflightOptions optionsWithAccessToken:] or the builder
  method [TVOPreflightOptions optionsWithAccessToken:block:] to create the options object as an argument when
  calling the [TwilioVoiceSDK runPreflightTestWithOptions:delegate:] method.
• A new class TVOPreflightTest is added. This object cannot be initialized directly. Instead a TVOPreflightTest
  object is returned when calling the [TwilioVoiceSDK runPreflightTestWithAccessToken:delegate:] and [TwilioVoiceSDK runPreflightTestWithOptions:delegate:]
  methods. Please note that the stop() method can be used to disconnect the preflight test but will result in the
  [TVOPreflightDelegate preflight:didFailWithError:] callback with the TVOPreflightTestStatusFailed state of the
  preflight test.
• A new protocol class TVOPreflightDelegate is added. Status updates of the preflight test will be raised via the
  delegate methods in this class.
• A new class TVOPreflightReport is added. A comprehensive report object will be returned in the [TVOPreflightDelegate preflight:didCompleteWitReport:]
  callback. The report can also be retrieved using the TVOPreflightTest.preflightReport property when the preflight test
  has completed.

An example of making a preflight test

class ViewController: UIViewController {
    var preflightTest: PreflightTest? = nil

    func performPreflight() {
        let preflightOptions = PreflightOptions(accessToken: accessToken, block: { builder in
            builder.preferredAudioCodecs = [OpusCodec()]
        })

        preflightTest = TwilioVoiceSDK.runPreflightTest(options: preflightOptions, delegate: self)
    }
}

extension ViewController: PreflightDelegate {
    func preflightDidComplete(preflightTest: PreflightTest, report: PreflightReport) {
        // Check the result in the report
    }

    func preflightDidFail(preflightTest: PreflightTest, error: any Error) {
        // Check the failure reason in the error
    }

    func preflightDidConnect(preflightTest: PreflightTest) {
        // preflight test has connected
    }
}

Bug Fixes

• This release uses a WebRTC patch that addresses a potential ICE gathering or network handover issue on iOS 18.

Size Impact

Architecture	Compressed Size	Uncompressed Size
arm64	3.4 MB	7.8 MB

Twilio Voice SDK iOS 6.11.3

September 10, 2024

• Programmable Voice iOS SDK 6.11.3 [XCFramework] (checksum: 0d8bcd777590bb7cf441a37d8fedfd1ce5babb1885f94a1d9976de9acbcf1611).

Enhancements

• The SDK is now using reSIProcate 1.12.0 for the signaling connection.
• The SDK now supports Server Name Indication (SNI) during initial TLS handshake with Twilio infrastructure.

Known Issues

• The TVOCallMessageBuilder.contentType has no effect on the content type of the TVOCallMessage object. The content type always defaults to application/json.

Size Impact

Architecture	Compressed Size	Uncompressed Size
arm64	3.3 MB	7.6 MB