As announced at last week’s event, Apple has just released iOS 12, the latest version of its mobile operating system, featuring significant performance improvements for older iPhones along with a number of new and enhanced features. iOS 12 supports all of the same devices as iOS 11, ranging back to the 2013 iPhone 5s, and promises huge speed boosts for older devices, such as a 70 percent improvement in Camera launch times, a 50 percent improvement…