We received notification that the network issues previously reported by United States (US) - ATT 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) 10DLC end users should no longer experience delays receiving SMS messages as all services are back to functioning properly.
On behalf of the Operator, we apologize for any inconvenience this issue may have caused. If you have additional questions, please feel free to contact support@telesign.com.
SF 01239806
Posted Sep 21, 2026 - 23:36 PDT
Update
Issue: US Operator - ATT Mobility (310/016;030;150;170;280;380;410;670) -10 DLC only Quality degradation
We currently experience quality degradation toward United States (US) - ATT Mobility (310/016;030;150;170;280;380;410;670) -10 DLC only. 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.
Issue: US Operator - ATT Mobility (310/016;030;150;170;280;380;410;670) -10 DLC only Quality degradation
Date: 09/21/26 Start Time:14:00 PM PST End Time: Ongoing
Summary:
We currently experience quality degradation toward United States (US) - ATT Mobility (310/016;030;150;170;280;380;410;670) -10 DLC only. 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.