AT&T has said that a massive outage that left people unable to make calls – including to 911 – was not caused by a cyber attack.
The provider said thew outage was caused by “the application and execution of an incorrect process” during network expansion. “We are continuing our assessment of today’s outage to ensure we keep delivering the service that our customers deserve,” the statement read.
The outage, which began early on Thursday, led to warnings from emergency services and advice from companies to get around the issue.
AT&T has around 250 million customers, making it the US’s biggest phone network by some distance. The company said all its entire network had been restored around 3pm ET.
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