Verizon customers reported their mobile phone service wasn't working in cities across the U.S., giving them only SOS mode.

A widespread Verizon outage hit mobile phone customers across California and the U.S. on Monday, limiting some residents to emergency phone calls, so-called SOS mode. Downdetector, a website that crowd-sources reports of such disruptions, showed hundreds of customers in the Sacramento area began reporting outages around 7 a.m.