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

> Incident updated: Voice Call Failures from a Subset of Twilio Phone Numbers to T-Mobile United States. Detected 2026-10-29 by Rewindex: what changed on Twilio’s status page, with the before/after diff.

Canonical: https://rewindex.com/change/r84b00091849f14
Last updated: 2026-10-29T03:13:52Z

**Summary:** _summary pending_
- Kind: Incident update · Label: Normal progress (rule)
- Changed: 2026-10-29 03:13 UTC · Detected: 2026-10-29 03:13 UTC
- [Source: https://status.twilio.com/incidents/w874yx5qwkqc](https://status.twilio.com/incidents/w874yx5qwkqc)
- [Company: Twilio](https://rewindex.com/company/twilio.md)
- Versions: before incident\_version:125/w874yx5qwkqc@159f72e105c7 → after incident\_version:125/w874yx5qwkqc@ce25a95c335b
- Change 1 of 4 for this incident

Incident page (full timeline): [Voice Call Failures from a Subset of Twilio Phone Numbers to T-Mobile United States](https://rewindex.com/company/twilio/incidents/w874yx5qwkqc.md)
## What changed

**1. Changed: Status**

```diff
- monitoring
+ identified
```

**2. Added: Update** (identified) · 2026-10-29 02:58 UTC

```diff
+ 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.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-10-29 03:13 UTC | Incident updated: Voice Call Failures from a Subset of Twilio Phone Numbers to T-Mobile United States (this change) | Normal progress |
| 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) | Normal progress |
| 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) | Normal progress |
| 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) | Normal progress |

Next: [change](https://rewindex.com/change/r966881d222c8af.md) · All Twilio changes: [timeline](https://rewindex.com/company/twilio/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


---
Canonical: https://rewindex.com/change/r84b00091849f14 · Markdown: https://rewindex.com/change/r84b00091849f14.md · JSON: https://rewindex.com/api/v1/changes/r84b00091849f14 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-29T11:14:29.670Z