SMS Delivery Delays from Twilio Phone Numbers to T-Mobile United States
Incident Lifecycle
Incident Timeline
Monitoring
We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US , Our team has monitoring the cause, and is working to resolve the issue. We will provide another update in 2 hour or as soon as more information becomes available.
May 21, 2026 at 6:03 PM UTC
Identified
We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US with the exception of a subset of short codes, Our team has identified the cause, and is working to resolve the issue. We will provide another update in 24 hour or as soon as more information becomes available.
May 21, 2026 at 12:01 PM UTC
Identified
We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US with the exception of a subset of short codes, Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hour or as soon as more information becomes available.
May 21, 2026 at 3:59 AM UTC
Identified
We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US with the exception of a subset of short codes, Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hour or as soon as more information becomes available.
May 20, 2026 at 11:49 PM UTC
Identified
We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US with the exception of a subset of short codes, Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hour or as soon as more information becomes available.
May 20, 2026 at 9:47 PM UTC
Identified
We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US with the exception of a subset of short codes, 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.
May 20, 2026 at 8:45 PM UTC
Monitoring
We have observed a recovery in SMS and MMS delivery from Twilio Phone Numbers to T-Mobile network subscribers in the United States and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.
May 20, 2026 at 6:24 PM UTC
Identified
Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Short Codes to T-Mobile network subscribers in the United States. 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.
May 20, 2026 at 4:55 PM UTC
Identified
Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Short Codes to T-Mobile network subscribers in the United States. 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.
May 20, 2026 at 3:54 PM UTC
Investigating
Twilio customers may be experiencing SMS delivery delays from Twilio Phone Numbers to T-Mobile network subscribers in the United States. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.
May 20, 2026 at 3:43 PM UTC
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