AT&T customers have been affected by widespread cellular service outages in the United States

AT&T's network suffered widespread outages across the country Thursday morning with cellular and internet service down, according to tracking site Downdetector.

Other cellular providers, including Verizon, T-Mobile and Cricket Wireless, also reported service outages. Verizon and T-Mobile said those affected were trying to contact AT&T users.

About 75% of AT&T's network services have been restored as the number of outages across different carriers steadily decreased throughout the day.

It is still unclear what led to the outage.

Follow live updates on reported AT&T outages

There were more than 32,000 AT&T service outages It was reported by customers around 4 a.m. ET on Thursday. Reports declined and then rose again to more than 50,000 around 7 a.m., with the most cases reported in Houston, Chicago, Dallas, Los Angeles and Atlanta, according to the site.

That number rose to more than 71,000 before 8 a.m. ET.

Just over 1,100 T-Mobile outages and about 3,000 Verizon outages were reported as of 7 a.m. Thursday.

AT&T acknowledged the issue Thursday morning, saying, “Some of our customers are experiencing an outage in wireless service this morning.”

Since then, the company has made progress in restoring service.

“Our network teams took immediate action and so far three-quarters of our network has been restored,” AT&T said in a statement. “We are working as quickly as possible to restore service to remaining customers.”

Cricket Wireless, which is owned by AT&T and uses its network, is also experiencing cellular issues. More than 13,500 customers reported outages as of 8 a.m. ET Thursday. The number dropped to about 10,000 by 10 am

“Allow us to explain that there is a nationwide network incident affecting multiple services,” The company wrote on X. “Cricket’s top priority is to return the service to full capacity as quickly and safely as possible.”

Verizon said Thursday morning that the outage does not directly affect its network, but only customers trying to reach another carrier.

T-Mobile also said early Thursday that the network did not suffer an outage and was operating normally, and the Downdetector numbers likely reflect customers trying to reach users on other networks.

The number of outages across cellular providers declined steadily throughout the day Thursday. As of 1 p.m. ET, AT&T reported 16,700 outages, Cricket Wireless 3,100, Verizon 1,300, and T-Mobile 800, according to Downdetector.

AT&T did not reveal the cause of the nationwide outage, although the US Cybersecurity and Infrastructure Security Agency said there was no indication of a cyberattack.

The most likely cause of the outage was “cloud misconfiguration,” which is “a fancy word for human error,” Lee McKnight, an assistant professor at Syracuse University's College of Information Studies, said in a statement.

The Federal Communications Commission is actively investigating the incident.

The outages were a concern for some customers Thursday morning who may not be able to reach 911 in the event of an emergency.

the The San Francisco Fire Department said on X It was aware of an issue affecting AT&T wireless customers making and receiving phone calls, including calls to 911.

“The San Francisco 911 Center remains operational,” the office said. “If you are an AT&T customer and cannot call 911, please try calling from a landline. If this is not an option, please try calling a friend or family member who is a customer with a different carrier and ask them to call 911 for you.

Similarly, Chicago Office of Emergency Management and CommunicationsVirginia Prince William County Police Departmentand North Carolina Charlotte-Mecklenburg Police Department They issued warnings on X alerting the public about the outage while acknowledging that some customers were briefly unable to call 911.

Atlanta Mayor Andre Dickens said in a statement The city is collecting information to help solve the problem.

“The Atlanta e-911 phone is capable of receiving incoming calls and making outgoing calls. We have received calls from AT&T customers saying their cell phones are in SOS mode,” Dickens said.

Apple support confirmed iPhone users who see SOS displayed in their status bar can still make emergency calls over other carrier networks.

Agencies across the country have urged people to refrain from calling 911 to test their service. The line is intended for true emergencies only.

This is a developing story. . Please check back for updates