AT&T users reported they're experiencing an outage leaving them with no cell service or home WiFi.
The outage began around 9:40am ET, with customers reporting their cell service was completely down.
Reports showed that phones couldn't access 5G home internet and users complained that they couldn't make or receive calls.
AT&T has not yet commented on the outage or when customers can expect their service to be restored.
The AT&T outage comes shortly after thousands of Verizon and T-Mobile customers reported they weren't able to send or receive calls and texts.
An AT&T outage has left customers without cell service and unable to use WiFi
AT&T has more than 100 million users in the US - but the amount hit by the outage is unknown.
People took to Downdetector, a site that monitors online issues, to report the outage on Monday morning in areas as widespread as Chicago, Atlanta, New York City and Houston.