iPhone update brings with it fixes to keep hackers from accessing the most central parts of iOS 10

Phones that haven't yet been updated to the new version of iOS could fall victim to a range of security flaws. Bugs in the code of iOS can allow hackers to break into many of the most central parts of the iPhone or iPad. The problem could let people get access to things like unlocking and the OS's kernel, letting anyone who had access run apps and so potentially steal information. The problem is fixed by updating to the latest version of iOS, version 10.2.1. The update doesn't bring with it any major features, but fixes those problems, which could affect any devices after the iPhone 5 and the fourth generation of the iPad.