Deep-dive review: iOS 10 adds speed and smarts

Ten versions of iOS have been released since the iPhone's debut in 2007. At the time, the groundbreaking OS, coupled with innovative touchscreen hardware, changed the mobile landscape and altered what people expect from their mobile devices.
Now, a decade later, comes a feature-rich iOS 10, delivering subtle refinements to the user interface, new capabilities and important enhancements to oft-used applications. The overall effect is a cohesive OS made more useful by tying together functions in