Quality degradation - United States (US) - ATT Mobility

Update timeline

1. investigating Apr 18, 2026, 01:48 AM UTC

   Issue: US/CA Operator - Quality degradation Start Time: 18:47 PT - 04/17/26 End Time: Ongoing Summary: We currently experience quality degradation toward United States (US). SMS messages towards these operator(s) may face delays or difficulties in delivery. Telesign is engaged with carrier partners for updates on resolution. We'd like to apologize for any inconvenience and appreciate your patience during this service interruption. If you have any questions, please contact [email protected].

2. investigating Apr 18, 2026, 04:50 AM UTC

   Issue: United States (US) - ATT Mobility (310/016;030;150;170;280;380;410;670) - Quality degradation Start Time: 06:47 PM PST - 04/17/26 Summary: We received notification that ATT Mobility (310/016;030;150;170;280;380;410;670) from United States (US) is currently experiencing network issues, and this may cause a delay in the delivery of SMS messages. Telesign is engaged with the operators for updates on resolution. We'd like to apologize for any inconvenience and appreciate your patience during this service interruption. If you have any questions, please contact [email protected]. SF 01159308

3. resolved Apr 18, 2026, 05:43 AM UTC

   Start Time: 18:47 PM PST - 04/17/26 End Time: 21:57 PM PST - 04/17/26 We received notification that the network issues previously reported byATT Mobility (310/016;030;150;170;280;380;410;670) from United States (US) have been resolved. ATT Mobility (310/016;030;150;170;280;380;410;670) end users should no longer experience delays receiving SMS messages as all services are back to functioning properly. SF[01159308]