AT&T is facing scrutiny after a significant outage disrupted 911 services and wireless connections across multiple US cities the incident which occurred on Tuesday was reportedly caused by a software glitch during a network expansion as a result many customers found their phones in SOS mode unable to connect to Emergency Services or make regular calls local authorities in several regions including Central Florida advised residents to use non emergency numbers as an alternative while the issue persisted the outage lasted several hours before AT&T managed to restore Services later that evening this incident has prompted an investigation by federal agencies including the Department of Homeland Security to ensure such critical failures are prevented in the future you've been watching worldwide news now 15 thank you and please subscribe