Beta testers who have enrolled in Apple's beta test program will receive the iOS 12 beta update after installing the correct certificate an iOS device.
Those who want to join the beta test program can register the Apple beta test website, which allows users to access beta iOS, macOS and tvOS. Before you install a beta, make sure to create a full encrypted iTunes backup or an iCloud backup and make sure you install iOS 12 a secdary device because the beta software is not always stable and may include bugs.
The new beta versi of iOS 12 introduces particular new issues with Screen Time, the App Store and Siri Shortcuts, according to Apple's release notes for the beta versi of the developer. Apps in the App Store may not be downloaded correctly the first time, screen time data may not be synchrized between devices and Siri shortcuts may not work properly CarPlay and HomePod, as well as whether a device is locked. The bar of cellular status the iPhone X may also be inaccurate.
iOS 12 brings Group FaceTime, local multiplayer AR experiences, new Animoji, and a Memoji feature designed to let you create a custom Animoji that looks like you.