# SMS Delivery Failures between Twilio Phone Numbers and AT&T in Mexico - Provider: [Twilio](https://down.guide/twilio) - Level: confirmed - Impact: Degraded - lasted 4d 15h - started 2026-05-14 20:50 UTC - SMS, Latin America - id: DWN-16f30e357d - Official page: https://stspg.io/w9pjblbxm8hd ## Updates from Twilio ### 2026-05-14 20:50 UTC: investigating Twilio customers may be experiencing SMS delivery failures from Twilio Phone Numbers to AT&T network subscribers in Mexico. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available. ### 2026-05-14 20:58 UTC: identified Twilio customers may be experiencing SMS delivery failures from Twilio Phone Numbers to AT&T network subscribers in Mexico. 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. ### 2026-05-14 22:01 UTC: identified Twilio customers may be experiencing SMS delivery failures from Twilio Phone Numbers to AT&T network subscribers in Mexico. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available. ### 2026-05-14 22:33 UTC: identified Twilio customers may be experiencing SMS delivery failures between Twilio Phone Numbers and AT&T network subscribers in Mexico. 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. ### 2026-05-14 23:34 UTC: identified Twilio customers may be experiencing SMS delivery delays and failures between Twilio Phone Numbers and AT&T network subscribers in Mexico. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available. ### 2026-05-15 01:34 UTC: identified Twilio customers may be experiencing SMS delivery delays and failures between Twilio Phone Numbers and AT&T network subscribers in Mexico. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available. ### 2026-05-15 05:37 UTC: identified Twilio customers may be experiencing SMS delivery failures between Twilio Phone Numbers and AT&T network subscribers in Mexico. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available. ### 2026-05-15 13:44 UTC: identified Twilio customers may be experiencing SMS delivery delays and failures between Twilio Phone Numbers and AT&T network subscribers in Mexico. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 16 hours or as soon as more information becomes available. ### 2026-05-16 05:45 UTC: identified Twilio customers may be experiencing SMS delivery failures and delays between Twilio Phone Numbers and AT&T network subscribers in Mexico. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 24 hours or as soon as more information becomes available. ### 2026-05-17 05:46 UTC: identified Twilio customers may be experiencing SMS delivery delays and failures between Twilio Phone Numbers and AT&T network subscribers in Mexico. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 24 hours or as soon as more information becomes available. ### 2026-05-18 05:51 UTC: identified Twilio customers may be experiencing SMS delivery failures between Twilio Phone Numbers and AT&T network subscribers in Mexico. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 24 hours or as soon as more information becomes available. ### 2026-05-19 05:54 UTC: monitoring We have observed a recovery in SMS delivery between Twilio Phone Numbers and AT&T network subscribers in Mexico and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available. ### 2026-05-19 07:56 UTC: monitoring We have observed a recovery in SMS delivery between Twilio Phone Numbers and AT&T network subscribers in Mexico and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available. ### 2026-05-19 12:01 UTC: resolved The incident has been resolved and SMS delivery between Twilio Phone Numbers and AT&T network subscribers in Mexico is operating normally. --- down.guide reads providers' official status pages every minute and adds its own evidence, always labeled. Free, no account. Agents: MCP at https://down.guide/mcp, REST at https://down.guide/api/v1, feeds at https://down.guide/feed. Built by Sazabi (https://sazabi.com/?utm_source=down-guide&utm_medium=markdown).