SMS Delivery Receipt Delays from Twilio to Three United Kingdom

Update timeline

1. investigating Sep 02, 2026, 11:58 AM UTC

   Twilio customers may be experiencing SMS delivery receipt delays from Twilio to H3G network subscribers in the United Kingdom. Our team is actively investigating this issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 1 hour or as soon as more information becomes available.

2. identified Sep 02, 2026, 01:03 PM UTC

   Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to H3G network subscribers in the United Kingdom. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 1 hour or as soon as more information becomes available.

3. identified Sep 02, 2026, 02:05 PM UTC

   Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to H3G network subscribers in the United Kingdom. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 2 hours or as soon as more information becomes available.

4. identified Sep 02, 2026, 04:05 PM UTC

   Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to H3G network subscribers in the United Kingdom. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 4 hours or as soon as more information becomes available.

5. identified Sep 02, 2026, 08:05 PM UTC

   Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to H3G network subscribers in the United Kingdom. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 8 hours or as soon as more information becomes available.

6. monitoring Sep 02, 2026, 11:05 PM UTC

   We have observed a recovery in SMS delivery receipts from a subset of Twilio Long Codes to H3G network subscribers 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.

7. identified Sep 02, 2026, 11:44 PM UTC

   Twilio customers may be experiencing SMS delivery receipt delays from Twilio to Three network subscribers in the United Kingdom. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 1 hour or as soon as more information becomes available.

8. monitoring Sep 02, 2026, 11:44 PM UTC

   We have observed a recovery in SMS delivery receipts from Twilio to Three network subscribers 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.

9. monitoring Sep 03, 2026, 01:10 AM UTC

   We have observed a recovery in SMS delivery receipts from a subset of Twilio Long Codes to H3G network subscribers in the United Kingdom and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

10. monitoring Sep 03, 2026, 01:50 AM UTC

    We have observed a recovery in SMS delivery receipts from Twilio to Three network subscribers in the United Kingdom and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

11. monitoring Sep 03, 2026, 05:23 AM UTC

    We have observed a recovery in SMS delivery receipts from a subset of Twilio Long Codes to H3G network subscribers in the United Kingdom and are monitoring service stability. We will provide another update in 8 hours or as soon as more information becomes available.

12. monitoring Sep 03, 2026, 05:57 AM UTC

    We have observed a recovery in SMS delivery receipts from Twilio to Three network subscribers in the United Kingdom and are monitoring service stability. We will provide another update in 8 hours or as soon as more information becomes available.

13. monitoring Sep 03, 2026, 01:23 PM UTC

    We have observed a recovery in SMS delivery receipts from a subset of Twilio Long Codes to H3G network subscribers in the United Kingdom and are monitoring service stability. We will provide another update in 16 hours or as soon as more information becomes available.

14. monitoring Sep 03, 2026, 01:58 PM UTC

    We have observed a recovery in SMS delivery receipts from Twilio to Three network subscribers in the United Kingdom and are monitoring service stability. We will provide another update in 16 hours or as soon as more information becomes available.

15. monitoring Sep 04, 2026, 05:35 AM UTC

    We have observed a recovery in SMS delivery receipts from a subset of Twilio Long Codes to H3G network subscribers in the United Kingdom and are monitoring service stability. We will provide another update in 24 hours or as soon as more information becomes available.

16. monitoring Sep 04, 2026, 05:59 AM UTC

    We have observed a recovery in SMS delivery receipts from Twilio to Three network subscribers in the United Kingdom and are monitoring service stability. We will provide another update in 24 hours or as soon as more information becomes available.

17. resolved Sep 04, 2026, 03:30 PM UTC

    The incident has been resolved and SMS delivery receipts from Twilio to Three network subscribers in the United Kingdom are operating normally.