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

> Twilio status incident “Voice Call Failures from a Subset of Twilio Phone Numbers to T-Mobile United States” on 2026-10-29: impact minor (vendor’s label), 7 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/twilio/incidents/w874yx5qwkqc
Last updated: 2026-10-29T10:36:30Z

- Impact (vendor’s label): minor
- Status: monitoring · edited after publishing
- Started: 2026-10-29 01:34 UTC · Resolved: not resolved · Duration: ongoing
- Updates: 7 · Affected components: CARRIER NETWORK - Voice, North America, Voice, North America
- [Vendor status page: https://status.twilio.com/incidents/w874yx5qwkqc](https://status.twilio.com/incidents/w874yx5qwkqc)
- [Company: Twilio](https://rewindex.com/company/twilio.md)

## Timeline of updates

- **investigating** 2026-10-29 01:34 UTC: 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.
- **identified** 2026-10-29 01:43 UTC: 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.
- **monitoring** 2026-10-29 01:45 UTC: 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.
- **identified** 2026-10-29 02:58 UTC: 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.
- **identified** 2026-10-29 04:01 UTC: 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.
- **monitoring** 2026-10-29 05:54 UTC: 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.
- **monitoring** 2026-10-29 07:55 UTC: 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.

## Rewindex changes for this incident

- 2026-10-29 03:13 UTC: [Incident updated: Voice Call Failures from a Subset of Twilio Phone Numbers to T-Mobile United States](https://rewindex.com/change/r84b00091849f14.md)
- 2026-10-29 04:03 UTC: [Incident updated: Voice Call Failures from a Subset of Twilio Phone Numbers to T-Mobile United States](https://rewindex.com/change/r966881d222c8af.md)
- 2026-10-29 06:03 UTC: [Incident updated: Voice Call Failures from a Subset of Twilio Phone Numbers to T-Mobile United States](https://rewindex.com/change/r26cbc0b1112d56.md)
- 2026-10-29 08:03 UTC: [Incident updated: Voice Call Failures from a Subset of Twilio Phone Numbers to T-Mobile United States](https://rewindex.com/change/rd06928bc5f1ff1.md)


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Canonical: https://rewindex.com/company/twilio/incidents/w874yx5qwkqc · Markdown: https://rewindex.com/company/twilio/incidents/w874yx5qwkqc.md · JSON: https://rewindex.com/api/v1/companies/twilio/incidents/w874yx5qwkqc · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-29T10:36:30.919Z