SMS Delivery Failures on China Mobile

Incident Report for Twilio

Resolved

We have reached out to affected customers to share more details on China Mobile ceasing support for GSM7-encoded messages and the recommended next-steps. With that, we are resolving the incident and will continue to work with affected customers via email.

Posted Nov 12, 2020 - 18:01 PST

Update

The message delivery failure for pre-registered GSM7-encoded SMS to China Mobile has been identified to be an issue on the mobile operator's end. Pre-registered Unicode messages are not affected. There's currently no ETA provided by the operator in restoring the service. Twilio will be reaching out to affected customers via email and recommend next steps.

Posted Nov 12, 2020 - 07:50 PST

Identified

We are experiencing delivery failures for pre-registered SMS messages encoded as GSM7 to China Mobile. Pre-registered Unicode messages are not affected and working as expected. Our engineers are working with our carrier partner to resolve the issue. We expect to provide another update in 16 hours or as soon as more information becomes available.

Posted Nov 11, 2020 - 20:00 PST

Update

We are experiencing delivery failures for pre-registered SMS messages encoded as GSM7 to China Mobile. Pre-registered Unicode messages are not affected and working as expected. Our engineers are working with our carrier partner to resolve the issue. We expect to provide another update in 8 hours or as soon as more information becomes available.

Posted Nov 11, 2020 - 12:00 PST

Update

We are experiencing delivery failures for pre-registered SMS messages encoded as GSM7 to China Mobile. Pre-registered unicode messages are not affected and working as expected. Our engineers are working with our carrier partner to resolve the issue. We expect to provide another update in 4 hours or as soon as more information becomes available.

Posted Nov 11, 2020 - 08:03 PST

Investigating

We are experiencing delivery failures sending GSM encoded messages to China Mobile. Our engineers are working with our carrier partner to resolve the issue. We expect to provide another update in 2 hours or as soon as more information becomes available.

Posted Nov 11, 2020 - 06:04 PST

This incident affected: CARRIER NETWORK (SMS, APAC).