Some customers said resetting their network settings also helped resolve the issue.
In response to one complaint on Twitter at around 3:20 p.m. PT, Verizon said its “technicians are on site working on the towers as we speak.”
“We are experiencing a network issue impacting voice services for some customers in parts of Southern California. Our engineers have identified the issue and are working to resolve it as quickly as possible,” Verizon said in an emailed statement. “Customers can try placing their device in airplane mode for 30 seconds or restarting their phone if they are impacted and that should fix the issue.”
Verizon outage takes down some wireless services in Southern California – CNET