Verizon notified customers Monday evening that it had “fully restored” the disruption that led to a mass outage of service for tens of thousands of customers.

“Verizon engineers have fully restored today’s network disruption that impacted some customers. Service has returned to normal levels,” the company posted on X. “If you are still having issues, we recommend restarting your device. We know how much people rely on Verizon and apologize for any inconvenience.We appreciate your patience.”

Verizon engineers have fully restored today’s network disruption that impacted some customers. Service has returned to normal levels. If you are still having issues, we recommend restarting your device. We know how much people rely on Verizon and apologize for any inconvenience.…

— Verizon News (@VerizonNews) September 30, 2024

Verizon has not yet publicly said what caused the issue.

^{Original story: Sept. 30, 2024:}

Around 10 a.m. Monday, Verizon users began reporting outages on social media and to Down Detector that they have no service except SOS mode. Verizon acknowledged the “issue impacting service” at 11:48 a.m.

We are aware of an issue impacting service for some customers. Our engineers are engaged and we are working quickly to identify and solve the issue.

— Verizon News (@VerizonNews) September 30, 2024

The issue has been ongoing since its peak this morning when it had more than 100,000 queries — Tom’s Guide reports the number is down to the 40,000 range.

Reuters reports that the FCC is investigating and “working to determine the cause and extent of these service disruptions.”

At 5:04 p.m., Verizon updated customers on X and said it was a “network issue” that has “started to be restored.”

“We continue to work around the clock to fully resolve this issue,” they added.

Verizon engineers are making progress on our network issue and service has started to be restored. We know how much people rely on Verizon and apologize for any inconvenience some of our customers experienced today. We continue to work around the clock to fully resolve this…

— Verizon News (@VerizonNews) September 30, 2024

Here’s what we know.

Where Is Verizon Down?

The massive Verizon outage appears to be across the U.S. with users from California to Ohio to Florida reporting issues.

Does Verizon Know About the Issue?

The company is aware of the issue, though it has not stated publicly what caused the outage. On its website and social media, Verizon said network engineers are working to identify and solve the problem.

Is AT&T Also Down?

Although users were also reporting issues with AT&T, the company said they are not experiencing outages, and it is just a residual effect.

We are not experiencing a nationwide outage. Our national network is operating normally. Down Detector is likely reflecting challenges our customers are having attempting to connect to users on another network.

— AT&T News (@ATTNEWS) September 30, 2024

What Is SOS Mode?

SOS mode occurs when your phone can’t connect to a network, though users still should be able to call 911.