From Dominick Reuter, who has been covering this.
Starts out: "The first wave of AT&T's five-day return-to-office mandate started on Monday. Conversations with half a dozen AT&T workers across the country this week indicate it hasn't been off to a smooth start."
https://www.businessinsider.com/att-begins-5-days-office-mandate-desks-parking-2025-1