By Sarah Kingsbury
Last week, Apple released iOS 10.3.1. The update addressed a serious security Wi-Fi vulnerability discovered by Google Project Zero. Surprisingly, the update reinstated support for the iPhone 5 and 5C (the last 32 bit processor devices made by Apple) allowing those with the older iPhones to protect themselves from the security weakness. And now, Apple has also stopped signing iOS 10.2.1 and iOS 10.3, which means it's no longer possible to downgrade from iOS 10.3.1.