Minor incident

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

Affected: Voice, North America

Current status of Twilio: Minor issues — live Twilio status

Timeline

1. Oct 29, 2026, 01:34 UTC
   investigating
   Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to network subscribers in the United States. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.
2. Oct 29, 2026, 01:43 UTC
   identified
   Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to T-Mobile network subscribers in the United States. 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.
3. Oct 29, 2026, 01:45 UTC
   monitoring
   We have observed a recovery in voice calls from a subset of Twilio Phone Numbers to T-Mobile network subscribers in the United States and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.
4. Oct 29, 2026, 02:58 UTC
   identified
   Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to T-Mobile network subscribers in the United States. 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.
5. Oct 29, 2026, 04:01 UTC
   identified
   Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to network subscribers in the United States. 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.
6. Oct 29, 2026, 05:54 UTC
   monitoring
   We have observed a recovery in voice calls from a subset of Twilio Phone Numbers to network subscribers in the United States and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.
7. Oct 29, 2026, 07:55 UTC
   monitoring
   We have observed a recovery in voice calls from a subset of Twilio Phone Numbers to T-Mobile network subscribers in the United States and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.
8. Oct 29, 2026, 11:55 UTC
   monitoring
   We have observed a recovery in voice calls from a subset of Twilio Phone Numbers to T-Mobile network subscribers in the United States and are monitoring service stability. We will provide another update in 8 hours or as soon as more information becomes available.
9. Oct 29, 2026, 14:20 UTC
   resolved
   The incident has been resolved and voice calls from a subset of Twilio Phone Numbers to T-Mobile network subscribers in the United States are operating normally.

Updates as published by Twilio (original).