Outage in Sinch

Delivery Issue United States - T-Mobile

Resolved Minor

March 29, 2026 - Started 2 days ago - Lasted about 2 hours
Official incident page

Incident Report

Summary AI Generated

Sinch experienced SMS delivery issues specifically affecting T-Mobile customers in the United States, causing delayed mobile-terminated and mobile-originated messages along with missing or late delivery receipts. The incident impacted SMS services across ShortCode, Toll Free, and 10DLC components for approximately 2 hours from March 28, 2026 at 23:59 UTC until resolution on March 29, 2026 at 01:52 UTC. A fix was implemented and monitored before the incident was fully resolved.

We are currently observing delivery issues in United States - T-Mobile Incident Start Time: 2026-03-28 23:59 UTC Impact: Delayed MT's/Delayed MO's/Missing delivery receipts/Late delivery receipts We will update as soon as we have more information. If you have any questions, please contact support@sinch.com.

Components affected

Sinch SMS - US - Toll Free Sinch SMS - US - 10DLC Sinch SMS - US - ShortCode

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Latest Updates ( sorted recent to last )

RESOLVED 2 days ago - at 03/29/2026 02:19AM

This incident has been resolved.

Incident Start Time: 2026-03-28 23:59 UTC

Incident End Time: 2026-03-29 01:52 UTC

MONITORING 2 days ago - at 03/29/2026 01:46AM

A fix has been implemented and we are monitoring the results.

INVESTIGATING 2 days ago - at 03/29/2026 12:22AM

We are currently observing delivery issues in United States - T-Mobile

Incident Start Time: 2026-03-28 23:59 UTC

Impact: Delayed MT's/Delayed MO's/Missing delivery receipts/Late delivery receipts

We will update as soon as we have more information.
If you have any questions, please contact support@sinch.com.

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