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Outage in Twilio

SMS Delivery Delays to China Unicom in China.

Resolved Minor
August 05, 2025 - Started 9 months ago - Lasted about 17 hours
Official incident page

Incident Report

We are experiencing SMS delivery delays when sending messages to China Unicom in China. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.
Components affected
Twilio SMS, APAC

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Latest Updates ( sorted recent to last )
RESOLVED 9 months ago - at 08/06/2025 12:34AM

We are no longer experiencing SMS delivery delays when sending messages to China Unicom in China. This incident has been resolved.

MONITORING 9 months ago - at 08/05/2025 10:34PM

We are observing recovery from SMS delivery delays when sending messages to China Unicom in China. We will continue monitoring the service to ensure a full recovery. We will provide another update in 2 hours or as soon as more information becomes available.

INVESTIGATING 9 months ago - at 08/05/2025 02:35PM

We continue to experience SMS delivery delays when sending messages to China Unicom in China. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

INVESTIGATING 9 months ago - at 08/05/2025 10:34AM

We continue to experience SMS delivery delays when sending messages to China Unicom in China. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

INVESTIGATING 9 months ago - at 08/05/2025 08:49AM

We continue to experience SMS delivery delays when sending messages to China Unicom in China. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

INVESTIGATING 9 months ago - at 08/05/2025 07:56AM

We are experiencing SMS delivery delays when sending messages to China Unicom in China. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

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