Apple’s iOS 9 software is already installed on well over 50% of existing devices, according to what Apple revealed in the first weekend after releasing the operating system. The new iOS version brings over a slew of improvements — though it doesn’t necessarily make older devices faster — as Apple focused mainly on performance gains rather than flashy new features.
Even so, there are plenty neat tricks available in iOS 9, including 3D Touch (only on iPhone 6s series), a smarter Siri and improved battery life. But there’s also one awesome feature that can turn out to be a nightmare for users.
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