How do you reinvigorate a legacy company without losing what made it great? In this special episode, as part of the recent HBR Leadership Summit 2026, AT&T CEO John Stankey shares how he refocused AT&T’s strategy on connectivity and simultaneously transformed its culture. He explains how he encouraged team members to adopt a more customer-led, market-driven mindset, integrate AI to reshape their products and performance, and embrace in-person collaboration.