Apple's Secret Retail Weapon Is Already in Your Pocket

Apple iPhone 5c showing iOS 7 Photograph by David Paul Morris/Bloomberg

It’s been a month since Apple unleashed iOS 7 onto the world, and while some of its flashier features have garnered a lot of attention, the most important part of iOS 7 is one you’ve probably never even heard of—even though, if you’ve upgraded, you already have it.

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