Outage in Twilio

SMS Character Encoding Issue for Korean, Arabic, and Spanish to a Subset of Small Networks in the US via a Subset of Short Codes

Resolved Minor
April 09, 2025 - Started 8 days ago - Lasted about 21 hours
Official incident page

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Outage Details

Our monitoring systems have detected a potential issue with SMS character encoding for Korean, Arabic, and Spanish to a subset of small networks in the US via subset of short codes. Our engineering team has been alerted and is actively investigating. We will update as soon as we have more information.
Latest Updates ( sorted recent to last )
RESOLVED 7 days ago - at 04/10/2025 08:41PM

We are no longer experiencing messages in Korean, Arabic, and Spanish languages showing question marks in place of special accent characters for these languages when sending SMS to T-Mobile, Verizon and small networks in the US via subset of shortcodes. This incident has been resolved.

MONITORING 8 days ago - at 04/10/2025 06:41PM

We are observing recovery in Korean, Arabic, and Spanish languages showing question marks in place of special accent characters for these languages when sending SMS to T-Mobile, Verizon and small networks in the US via subset of shortcodes. 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 8 days ago - at 04/10/2025 03:14PM

We keep experiencing messages in Korean, Arabic, and Spanish languages showing question marks in place of special accent characters for these languages when sending SMS to T-Mobile, Verizon and small networks in the US via subset of shortcodes. Our engineers are working with our carrier partner to resolve the issue. We will provide another update in 16 hours or as soon as more information becomes available.

INVESTIGATING 8 days ago - at 04/10/2025 07:21AM

We are continuing to experience messages in Korean, Arabic, and Spanish languages showing question marks in place of special accent characters for these languages when sending SMS to T-Mobile, Verizon and small networks in the US via subset of shortcodes. 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 8 days ago - at 04/10/2025 03:20AM

We are continuing to experience messages in Korean, Arabic, and Spanish languages showing question marks in place of special accent characters for these languages when sending SMS to T-Mobile, Verizon and small networks in the US via subset of shortcodes. 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 8 days ago - at 04/10/2025 01:20AM

We have identified messages in Korean, Arabic, and Spanish languages showing question marks in place of special accent characters for these languages when sending SMS to T-Mobile, Verizon and small networks in the US via subset of shortcodes. 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 8 days ago - at 04/10/2025 12:20AM

We are removing the 'SMS, Middle East and Africa' and 'SMS, APAC' components from this incident, as those components are not impacted. 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.

INVESTIGATING 8 days ago - at 04/10/2025 12:02AM

We have identified messages in Korean, Arabic, and Spanish languages are showing question marks in place of special accent characters for these languages when sending SMS to a subset of small networks in the US via subset of shortcodes. 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.

INVESTIGATING 8 days ago - at 04/09/2025 11:54PM

Our monitoring systems have detected a potential issue with SMS character encoding for Korean, Arabic, and Spanish to a subset of small networks in the US via subset of short codes. Our engineering team has been alerted and is actively investigating. We will update as soon as we have more information.

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