Massive AT&T outage impacts US mobile subscribers

A widespread U.S. mobile outage primarily impacted AT&T customers—disrupting calls, including some 911 access, across multiple states—while Verizon and T-Mobile reported largely normal networks aside from inter-carrier call issues; Cloudflare observed significant AT&T traffic drops during the incident. AT&T restored service the same day and said it was not a cyberattack but the result of an incorrect process during network expansion, advising temporary use of Wi‑Fi calling.