# Voice Call Audio Quality Degradation from T-Mobile United States to a Subset of Twilio United States Phone Numbers

- Provider: [Twilio](https://down.guide/twilio)
- Level: confirmed
- Impact: Degraded
- lasted 0m
- started 2026-03-19 19:59 UTC
- us
- id: DWN-02c09968f6
- Official page: https://stspg.io/4p8pb2syl0nt

## Updates from Twilio
### 2026-03-18 12:00 UTC: resolved
Twilio customers experienced voice call audio quality degradation from T-Mobile network subscribers in the United States to a subset of Twilio United States Phone Numbers from 08:20 PDT 03/18/2026 to 9:30 PDT 03/19/2026. The issue has been resolved.

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