SMS Delivery Report Delays from a Subset of Alphanumeric Sender IDs to MobiFone Vietnam
Incident Lifecycle
Incident Timeline
Monitoring
We have observed a recovery in SMS delivery receipts from a subset of Twilio Alphanumeric Senders to MobiFone network subscribers in Vietnam and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.
Mar 27, 2026 at 5:40 AM UTC
Identified
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Alphanumeric Senders to MobiFone network subscribers in Vietnam. Our team has identified the cause and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 8 hours or as soon as more information becomes available.
Mar 27, 2026 at 5:39 AM UTC
Identified
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Alphanumeric Senders to MobiFone network subscribers in Vietnam. Our team has identified the cause and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 4 hours or as soon as more information becomes available.
Mar 27, 2026 at 1:39 AM UTC
Identified
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Alphanumeric Senders to MobiFone network subscribers in Vietnam. Our team has identified the cause and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 2 hours or as soon as more information becomes available.
Mar 26, 2026 at 11:39 PM UTC
Identified
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Alphanumeric Senders to MobiFone network subscribers in Vietnam. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 1 hour or as soon as more information becomes available.
Mar 26, 2026 at 10:29 PM UTC
Investigating
Twilio customers may be experiencing SMS delivery report delays from a subset of alphanumeric Sender IDs to MobiFone network subscribers in Vietnam. Message delivery may succeed, but delivery receipts may be delayed. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.
Mar 26, 2026 at 10:03 PM UTC
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