Twilio Changelog

All Flex projects now have access to the Voice Insights advanced features:

• Time-series views of metrics
• Event Streams
• Programmatic access to call summaries

These features are enabled for all Flex projects and included in Flex Active User Hour and Named User paid plans.

Learn more about what's included with the advanced features in our documentation, and visit your dashboards within the Twilio Console.

The new version of Marketing Campaigns now supports A/B testing for Single Sends, allowing up to 6 variations of either subject line or content. The winner is chosen automatically based on either open rate or click rate performance (depending on the user’s selection).

The new version of Marketing Campaigns now supports the ability to duplicate and revamp an existing email design. From the design library, select “Duplicate” from the action menu.

This release of Flex UI introduces minor fixes to how we handle custom chat tasks, new notifications for call transfers failures and UI performance improvements.

For a full changelog, visit the Flex UI release notes

The Differentiated Services Code Point (DSCP) Tagging API allows you to mark the audio packets with Expedited Forwarding (EF) and video packets with Assured Forwarding (AF) for the purposes of prioritised packet routing. When enabled, supporting networks will prioritize audio and video packet delivery for improved audio and video quality. Note, only Chrome supports DSCP tagging.

For more information, refer to the [docs].

The TwiML Redirect Studio widget allows you to redirect control of a voice or messaging execution away from Studio to execute custom TWiML and then return back to the flow. This allows you to extend Studio further with your own custom code.

To learn more, visit the documentation on the TwiML redirect widget, or try it out in Studio.

The new version of Marketing Campaigns now supports contact storage for up to 10M contacts per user, with additional scale possible on a per-user request.

The new version of Marketing Campaigns uses a new syntax for the default or fallback value of a substitution tag used in a Marketing Campaigns email subject line or body content. The default syntax is {{ insert first_name "default=Customer" }}.

We have updated the characters that can be included in the credentials for webhook authentication. Starting today, characters will be limited to those that are included on this list. Please ensure your webhook credentials (username + password) adhere to this updated list to continue uninterrupted access to our webhook.

In order to keep you in carrier compliance and ensure fair service across all customers, we now have rate limits in place for MMS service. While you can still send messages to Twilio at a rapid rate, the delivery rate for each account is now capped at 25 messages per second (MPS) and for each Twilio long code at 1 MPS.

For time-sensitive messages, we recommend that you keep a close eye on the queue length via Message Queue Insights in the console. You can also find more details on this page.