It would not be the first 3-D phone, but it would set it apart from leading phones such as Apple's iPhone and Samsung's Galaxy S5. - Some analysts speculate that the 3-D feature might tie into an Amazon shopping app. Shoppers might be able to use the phone to take a 3-D picture of a product in a store, then search for the object on Amazon and buy it online. - Amazon's Kindle tablets run a highly mo