Verizon Wireless experienced a nationwide outage that left users in SOS mode. The company has since restored its network.

Verizon appears to be facing a massive outage, affecting customers across the U.S. On Monday, Sept. 30, many Verizon users found that their smartphones are stuck in SOS mode. This means that their device does not have cellular service and can only make emergency service calls.

On Monday, Verizon suffered a massive outage that affected customers across the country. While it’s not clear exactly how many customers were without service, Verizon has more than 114 million customers in the U.S.