Twilio - voice call audio quality degradation between Twilio phone numbers and multiple networks in United Kingdom

Update timeline

1. investigating Apr 30, 2026, 07:09 PM UTC

   We have detected potential service disruption through our monitoring systems and are actively investigating. A detailed assessment of the impact and affected services will be provided within the next 30 minutes.

2. investigating Apr 30, 2026, 07:15 PM UTC

   Twilio customers may be experiencing voice call audio quality degradation between twilio phone numbers and network subscribers on multiple networks in the United Kingdom. Twilio engineers are actively investigating this issue. We will provide an update as soon as more information becomes available.

3. identified Apr 30, 2026, 09:24 PM UTC

   Twilio team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

4. monitoring Apr 30, 2026, 11:43 PM UTC

   We have observed a recovery in voice calls between Twilio Phone Numbers and network subscribers on multiple networks in the United Kingdom and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

5. resolved May 01, 2026, 01:09 AM UTC

   Following comprehensive monitoring, we can confirm that the incident has been fully resolved and all services have returned to normal operation.