You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract In Attempt to Head Off Apple, Samsung Lets Consumers Test-Drive Smart Devices A 21-Day Trial Program Kicks Off in Five U.S. Cities By Mark Bergen, Published on June 26, 2014 1 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.