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On Thursday, AT&T outages on its cellular network, left thousands of users stranded without service for several hours.

The systemwide disruptions began at around 4am ET. Users across the United States experienced connectivity issues until around 3pm ET when AT&T announced that service had been restored.

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AT&T Outages Under Review

In a statement released on Thursday evening, AT&T attributed the outage to a software glitch rather than a cyber-attack. The carrier clarified that process problems during network expansion led to the disruption.

The outage's onset coincided with routine maintenance activities, typically conducted overnight, according to sources familiar with the matter.

 Reports flooding social media platforms corroborated the widespread nature of the issue, with Downdetector witnessing a surge in complaints from AT&T users nationwide, commencing around 4 AM ET.

Approximately 32,000 outages were reported by customers initially, with figures escalating to over 50,000 by 7 AM, primarily concentrated in major cities like Houston, Chicago, Dallas, Los Angeles, and Atlanta. The surge peaked at over 71,000 just before 8 AM ET, indicating the scale of the disruption.

Other Providers Impacted

AT&T's outage rippled across other cellular providers, with Verizon, T-Mobile, and Cricket Wireless also reporting service disruptions.

While Verizon and T-Mobile clarified that their networks remained intact, its customers attempting to contact AT&T users experienced difficulties.

For Cricket Wireless, a subsidiary of AT&T, over 13,500 customers reported outages initially, gradually subsiding to around 10,000 by mid-morning. The company posted on X assuring its users that they were prioritizing service restoration.

"Allow us to explain that there is a nationwide network incident impacting multiple services. It is Cricket's top priority to restore service to full capacity as quickly and safely as possible."

Investigations Continue

Despite the chaos, AT&T managed to restore service for all affected customers. And expressed regret for the inconvenience caused.

The company refrained from divulging specific details regarding the outage's triggers, while authorities like the FCC, FBI, and DHS initiated investigations to ascertain the root cause.