iOS 9.2.1 tests show small performance improvements on older devicesApple’s latest iOS 9.2.1 software, which was rolled out to beta testers on Wednesday, brings some small but welcome performance improvements to older iPhones. You can see those improvements in action on iPhone 5s, iPhone 5, and iPhone 4s in the videos below.
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iOS 9.2.1 tests show small performance improvements on older devices
