In a major disruption affecting over 100,000 customers across the United States, Verizon's mobile network has been reported down, leading users in multiple cities including Los Angeles, Texas, Chicago, Portland, and Seattle to experience service issues. Thousands are encountering problems with their phones displaying 'SOS' mode, causing confusion and frustration among users who are unable to make calls. The Federal Communications Commission (FCC) has launched an investigation into the incident. Verizon has acknowledged the issues and stated that their engineers are working to restore service as quickly as possible. As customer complaints flood in, users are advised to check outage maps and follow updates on the situation.