Resolved after 4 days 21 hours, affecting Alerts and Third Party Services, on February 19, 2026.
An investigation by our carrier partner found that US Cellular was incorrectly processing incoming messages, resulting in a decreased Alert success rate. This issue has been addressed by US Cellular as of 3pm CST. We expect that Alert delivery to US Cellular recipients has returned to normal, however we will continue to monitor Alert delivery rates.
Affected components
Update timeline
- investigating Feb 19, 2026, 07:53 PM UTC
US Cellular is currently experiencing service outages in North America. The following Apptegy services could be impacted: - Alerts (both SMS and Calls) sent to US Cellular users may be delayed - Analytics for Alerts sent to US Cellular may take longer to populate - Guardians attempting to login via 2FA may not be able to receive codes if their cellular service is provided by US Cellular
- identified Feb 20, 2026, 10:46 PM UTC
Our carrier partner has identified a recent increase in failed deliveries at the operator. They have opened an investigation with US Cellular in order to determine a root cause.
- monitoring Feb 23, 2026, 10:31 PM UTC
An investigation by our carrier partner found that US Cellular was incorrectly processing incoming messages, resulting in a decreased Alert success rate. This issue has been addressed by US Cellular as of 3pm CST. We expect that Alert delivery to US Cellular recipients has returned to normal, however we will continue to monitor Alert delivery rates.
- monitoring Feb 24, 2026, 04:07 AM UTC
An investigation by our carrier partner found that US Cellular was incorrectly processing incoming messages, resulting in a decreased Alert success rate. This issue has been addressed by US Cellular as of 3pm CST. We expect that Alert delivery to US Cellular recipients has returned to normal, however we will continue to monitor Alert delivery rates.
- resolved Feb 24, 2026, 05:37 PM UTC
US Cellular alert delivery rates have returned to normal operation.
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