Apple today released iOS 9, a revised version of its mobile operating system. The free update gives more power to Siri, brings public transit to Maps, adds the Discover Card to Apple Pay, and installs Apple's News app. iOS 9 also makes improvements to battery life, adds wireless support to CarPlay, and provides the iPad with split-screen multitasking. The new operating system works with iPhones dating back to the iPhone 4S. iOS 9 will ship with the iPhone 6s and 6s Plus.


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