Apple released iOS 7.1 on March 10, 2014 and it is the first major update to the operating system since it was first released in September 2013. It was released almost 5 months after the first beta of iOS 7.1 was released to developers. It made several improvements to the operating system including performance improvements and Siri enhancements. It also adds support for a new feature called CarPlay, which works by connecting an iPhone to a car that has a touchscreen. It is currently available for the iPhone 5, iPhone 5C, and iPhone 5S.