---
id: "INC-twilio-w874yx5qwkqc"
kind: "incident"
aliases: []
title: "Twilio: Voice Call Failures from a Subset of Twilio Phone Numbers to T-Mobile United States"
severity: "medium"
cvss: null
epss: null
exploited: false
status: "open"
category: "vendor"
products: [{"name": "Twilio", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["incident", "ops", "sms", "twilio", "vendor"]
not_affected_if: []
published_at: "2026-10-29T01:34:44+00:00"
first_seen_at: "2026-10-29T01:36:49+00:00"
updated_at: "2026-10-29T01:44:30+00:00"
sources: [{"source": "statuspage", "url": "https://stspg.io/h222bhk6xb0k", "first_seen_at": "2026-10-29T01:36:49+00:00"}]
---

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

## Affected

- vendor:Twilio affected ? fixed ?

## Timeline

- 2026-10-29T01:36:49+00:00 statuspage https://stspg.io/h222bhk6xb0k

## From the sources

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.

---

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