Amazon.com Incs new Fire smartphone features gimmicks – such as 3D effects and object scanner – that may not be enough to entice users away from similarly priced Apple Inc iPhones and Samsungs Galaxy S5, reviewers said. Among the features of its first smartphone, Amazon has introduced Dynamic Perspective, four cameras that track a users face and simulate a 3D effect on the screen. The phone also touts a Firefly scanner that allows users to point the phone at an object and be directed to Amazons online store to buy it. Look, Ma, no hands!, Wall Street Journals Geoffrey Fowler said.