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 7 months ago - Lasted about 21 hours
Official incident page

Incident Report

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.

Need to monitor Twilio outages?

One place to monitor all your cloud vendors. Get instant alerts when an outage is detected.

Latest Updates ( sorted recent to last )
RESOLVED 7 months 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 7 months 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 7 months 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 7 months 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 7 months 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 7 months 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 7 months 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 7 months 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 7 months 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.

The Status Page Aggregator Built for IT Teams

With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.

Start free trial

No credit card required · Cancel anytime · 4522 services available

Integrations with Slack Microsoft Teams Google Chat Datadog PagerDuty Zapier Discord Webhook