Voice Call Failures from T-Mobile United States to a Subset of Twilio United States Phone Numbers

Incident Report for Twilio

Resolved

We have completed our investigation and determined that this event did not result in any customer impact. All systems are operating normally.

Posted Aug 18, 2026 - 09:35 PDT

Update

Twilio customers may be experiencing voice call failures from T-Mobile network subscribers in the United States to a subset of Twilio United States Phone Numbers. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

Posted Aug 18, 2026 - 08:58 PDT

Identified

Twilio customers may be experiencing voice call failures from T-Mobile network subscribers in the United States to a subset of Twilio United States Phone Numbers. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

Posted Aug 18, 2026 - 08:57 PDT

Investigating

Twilio customers may be experiencing voice call failures from network subscribers to Twilio United States Phone Numbers. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

Posted Aug 18, 2026 - 07:56 PDT

This incident affected: CARRIER NETWORK (Voice, North America).