AT&T says the outage to its US cellphone network was not caused by a cyberattack

An AT&T retail location is shown in Willow Grove, Pa., Thursday, Feb. 22, 2024. A number of Americans are dealing with cellular outages on AT&T, Cricket Wireless, Verizon, T-Mobile and other service providers, according to data from Downdetector, Thursday, Feb. 22, 2024. AT&T, who was the hardest hit, is actively working to restore service to all of its customers. (AP Photo/Matt Rourke)

FILE _ A cellular phone tower is shown on Monday, May 22, 2017 in High Ridge, Mo. A number of Americans are dealing with cellular outages Thursday, Feb. 22, 2024, on AT&T, Cricket Wireless, Verizon, T-Mobile and other service providers, according to data from Downdetector. (AP Photo/Jeff Roberson)

A Verizon retail location is shown in Willow Grove, Pa., Thursday, Feb. 22, 2024. A number of Americans are dealing with cellular outages on AT&T, Cricket Wireless, Verizon, T-Mobile and other service providers, according to data from Downdetector, Thursday, Feb. 22, 2024. (AP Photo/Matt Rourke)

FILE - A man uses a cell phone in New Orleans on Aug. 11, 2019. A number of Americans are dealing with cellular outages on AT&T, Cricket Wireless, Verizon, T-Mobile and other service providers, according to data from Downdetector, Thursday, Feb. 22, 2024. (AP Photo/Jenny Kane, File)

FILE - A woman looks at her phone while watching the sun set as triple-digit heat indexes continue in the Midwest Sunday, Aug. 20, 2023, in Kansas City, Mo. A number of Americans on Thursday, Feb. 22, 204, are dealing with cellular outages on AT&T, Cricket Wireless, Verizon, T-Mobile and other service providers, according to data from Downdetector. AT&T, who was the hardest hit, is actively working to restore service to all of its customers. (AP Photo/Charlie Riedel, File)