OREANDA-NEWS. Christopher is responsible for wireless products and services, including voice and data plans, smartphones, tablets, wearables and cloud products, as well as marketing and advertising for AT&T Digital Life, Cricket Wireless and GoPhone. Christopher also oversees the award-winning AT&T Developer Program and its more than 55,000 members, leading the team that determines and delivers the APIs, tools and training developers need to build new and innovative platforms.