Charley’s Grilled Subs — a restaurant chain specializing in cheese steak sandwiches — has successfully increased engagement among customers and overall purchases as part of the brand’s newest SMS-focused initiative called: “Charley’s Philly Steak Blitz,” reported Ben LaPlaca, Creative Director of Charley’s, in an interview with Retail TouchPoints. Since the first SMS campaign in 2011, Charley’s has increased participation by more than 900%.