Agencies | Brands Mullen Beats Out Riney for U.S. Cellular Biz By Kiran Aditham on Feb. 21, 2012 - 2:40 PM Two weeks after reportedly cutting its agency review down to two finalists, Mullen and incumbent Publicis & Hal Riney, U.S. Cellular has chosen the former as its winner. As a result, Mullen will handle brand strategy, creative ...