# Twilio: Voice Call Failures from a Subset of Twilio Mobile Numbers to Telefonica Argentina

> Voice calls fail from some Twilio Mobile Numbers to Telefonica subscribers in Argentina. This affects Voice in Latin America and the carrier network for Voice in Latin America. Twilio identified the cause and is working to resolve the issue.

- Provider: [Twilio](https://outages.live/twilio.md)
- Type: Incident
- State: identified
- Worst impact: Degraded performance
- Started: 2026-11-05 18:34 UTC
- Components: Voice, Latin America, CARRIER NETWORK - Voice, Latin America
- Official update: https://stspg.io/t4vp65pctxst

## Updates from Twilio

### identified, 2026-11-05 19:15 UTC

Twilio customers may be experiencing voice call failures from a subset of Twilio Mobile Numbers to Telefonica network subscribers in Argentina. 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.

### investigating, 2026-11-05 18:36 UTC

Twilio customers may be experiencing voice call failures from a subset of Twilio Mobile Numbers to network subscribers in Argentina. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.