Voice Call Failures and Audio Quality Degradation Between a Subset of Twilio Hong Kong Phone Numbers and Multiple Networks in Hong Kong

Update timeline

1. investigating Aug 28, 2026, 10:33 AM UTC

   Twilio customers may be experiencing voice call failures and audio quality degradation between a subset of Twilio Phone Numbers and network subscribers on multiple networks in Hong Kong. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. investigating Aug 28, 2026, 11:33 AM UTC

   Twilio customers may be experiencing voice call failures and audio quality degradation between Twilio Phone Numbers and network subscribers on multiple networks in Hong Kong. Our team is actively investigating this issue. We will provide another update in 2 hours or as soon as more information becomes available.

3. investigating Aug 28, 2026, 01:39 PM UTC

   Twilio customers may be experiencing voice call failures and audio quality degradation between a subset of Twilio Phone Numbers and network subscribers on multiple networks in Hong Kong. Our team is actively investigating this issue. We will provide another update in 4 hours or as soon as more information becomes available.

4. identified Aug 28, 2026, 03:47 PM UTC

   Twilio customers may be experiencing voice call failures and audio quality degradation between Twilio Phone Numbers and network subscribers on multiple networks in Hong Kong. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

5. identified Aug 28, 2026, 04:47 PM UTC

   Twilio customers may be experiencing voice call failures and audio quality degradation between a subset of Twilio Phone Numbers and network subscribers on multiple networks in Hong Kong. Our 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.

6. identified Aug 28, 2026, 06:47 PM UTC

   Twilio customers may be experiencing voice call failures and audio quality degradation between a subset of Twilio Hong Kong Phone Numbers and network subscribers on multiple networks in Hong Kong. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

7. identified Aug 28, 2026, 10:48 PM UTC

   Twilio customers may be experiencing voice call failures and audio quality degradation between a subset of Twilio Hong Kong Phone Numbers and network subscribers on multiple networks in Hong Kong. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

8. identified Aug 29, 2026, 06:53 AM UTC

   Twilio customers may be experiencing voice call failures and audio quality degradation between a subset of Twilio Phone Numbers and network subscribers on multiple networks in Hong Kong. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 16 hours or as soon as more information becomes available.

9. identified Aug 29, 2026, 10:59 PM UTC

   Twilio customers may be experiencing voice call failures and audio quality degradation between a subset of Twilio Phone Numbers and network subscribers on multiple networks in Hong Kong. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 24 hours or as soon as more information becomes available.

10. identified Aug 30, 2026, 10:59 PM UTC

    Twilio customers may be experiencing voice call failures and audio quality degradation between a subset of Twilio Phone Numbers and network subscribers on multiple networks in Hong Kong. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 24 hours or as soon as more information becomes available.

11. monitoring Aug 31, 2026, 07:55 AM UTC

    We have observed a recovery in voice calls between a subset of Twilio Phone Numbers and network subscribers on multiple networks in Hong Kong and are monitoring service stability. We will provide another update in 24 hours or as soon as more information becomes available.

12. resolved Aug 31, 2026, 02:35 PM UTC

    The incident has been resolved and voice calls between a subset of Twilio Hong Kong Phone Numbers and network subscribers on affected networks in Hong Kong are operating normally.