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Google, Apple or Samsung: Who is the biggest smartphone copycat?

Nobody's perfect. And neither is anybody's phone. That's why Apple, Google, and Samsung often get accused of "borrowing" features from each other. It's a tight market. Who is the biggest culprit? Yahoo Finance Tech Critic, David Pogue, reveals what he discovered in a chat with Andy Serwer, Alexis Christoforous and BBG Ventures' Susan Lyne.