# Twilio: Incident updated: Silent Network Authentication (SNA) Failure Increase on AT&T in United States

> Incident updated: Silent Network Authentication (SNA) Failure Increase on AT&T in United States. Detected 2026-10-20 by Rewindex: what changed on Twilio’s status page, with the before/after diff.

Canonical: https://rewindex.com/change/r5f99a5f26ca2ad
Last updated: 2026-10-20T05:43:11Z

**Summary:** _summary pending_
- Kind: Incident update · Label: Normal progress (rule)
- Changed: 2026-10-20 05:43 UTC · Detected: 2026-10-20 05:43 UTC
- [Source: https://stspg.io/g83v994n3wvv](https://stspg.io/g83v994n3wvv)
- [Company: Twilio](https://rewindex.com/company/twilio.md)
- Versions: before incident\_version:125/sf1wgpv8z8hr@7fe9673901e2 → after incident\_version:125/sf1wgpv8z8hr@a6585f37d8f0
- Change 1 of 3 for this incident

Incident page (full timeline): [Silent Network Authentication (SNA) Failure Increase on AT&T in United States](https://rewindex.com/company/twilio/incidents/sf1wgpv8z8hr.md)
## What changed

**1. Changed: Status**

```diff
- investigating
+ identified
```

**2. Added: Update** (identified) · 2026-10-20 05:39 UTC

```diff
+ Twilio customers may be experiencing verification failures during API transactions for Silent Network Authentication (SNA) on AT&T in the United States. API transactions may temporarily fail over to secondary methods like SMS OTP. 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 |
| --- | --- | --- |
| 2026-10-20 05:43 UTC | Incident updated: Silent Network Authentication (SNA) Failure Increase on AT&T in United States (this change) | Normal progress |
| 2026-10-20 06:53 UTC | [Incident updated: Silent Network Authentication (SNA) Failure Increase on AT&T in United States](https://rewindex.com/change/rc6f5d153ec6cc0.md) | Normal progress |
| 2026-10-20 08:53 UTC | [Incident updated: Silent Network Authentication (SNA) Failure Increase on AT&T in United States](https://rewindex.com/change/r2a1f33f6f64c92.md) | Normal progress |

Next: [change](https://rewindex.com/change/rc6f5d153ec6cc0.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._

## Cite this

Incident updated: Silent Network Authentication (SNA) Failure Increase on AT&T in United States on Twilio’s status page, changed 2026-10-20 05:43 UTC (change 1 of 3).

- Canonical URL: https://rewindex.com/change/r5f99a5f26ca2ad
- Citation: Twilio, “Incident updated: Silent Network Authentication (SNA) Failure Increase on AT&T in United States” (2026-10-20 05:43 UTC). Archived by Rewindex: https://rewindex.com/change/r5f99a5f26ca2ad (CC BY 4.0).
- Markdown link: `[Twilio: Incident updated: Silent Network Authentication (SNA) Failure Increase on AT&T in United States (2026-10-20)](https://rewindex.com/change/r5f99a5f26ca2ad)`


---
Canonical: https://rewindex.com/change/r5f99a5f26ca2ad · Markdown: https://rewindex.com/change/r5f99a5f26ca2ad.md · JSON: https://rewindex.com/api/v1/changes/r5f99a5f26ca2ad · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-05T19:06:34.562Z