AT&T said on Thursday that it had fully restored service to its wireless network after a widespread outage temporarily cut off connections for users across the United States for many hours, the cause of which was still under investigation.
The outage, which affected people in cities including Atlanta, Los Angeles and New York, was first reported around 3:30 a.m. Eastern time, according to Downdetector.com, which tracks user reports of telecommunication and internet disruptions. At its peak, the site listed around 70,000 reports of disrupted service for the wireless carrier.
Multiple government agencies said they were looking into the incident, although the Biden administration told reporters that AT&T said there was no reason to think it was a cyberattack.
AT&T did not disclose the scope of the outage, nor the reason for it. When the outage first began on Thursday morning, the company listed the cause as “maintenance activity.”
Jim Greer, an AT&T spokesman, apologized in a statement confirming service was restored and said the company was “taking steps to ensure our customers do not experience this again in the future.”
The outage underscored the importance of connectivity to daily life as individuals and businesses were cut off from communications and the ability to use mobile apps. AT&T advised consumers they could make calls over Wi-Fi and sought to respond to angry customers online. Many phones showed an “SOS” symbol on their screen, signaling they could only make emergency calls, while local governments offered alternate ways to reach 911.