AT&T says its nationwide cellular outage was caused by a software update, not a cyberattack

The widespread AT&T cellular outage was caused by a software update, the network said.The company said it was not caused by a cyber attack, despite federal agencies looking into the downtime.The issue left some without service for close to 12 hours on Thursday and many angry customers. NEW LOOK Sign up to get the inside scoop on today’s biggest stories in markets, tech, and business — delivered daily. Read preview Thanks for signing up! Access your favorite topics in a personalized feed while you ...