Registered developers can download the first iOS 12 beta from Apple's Developer Center or over-the-air after installing the proper certificate.
The iOS 12 update brings major changes to the iOS operating system, with Apple working from top to bottom to make iPhones and iPads, especially older models, faster and more responsive.
On the iPhone X, there are new Animoji characters along with "Memoji" customizable, personalized Animoji that can be used both in Messages and in FaceTime. Messages and FaceTime have also gained fun new camera effects, and Group FaceTime support allows for calls with up to 32 people.
Siri is smarter in iOS 12 with a new Shortcuts feature that lets you create custom automations using first and third-party apps that can be activated with Siri, and Apple built a comprehensive set of time management and monitoring tools into iOS 12 with Screen Time.
New Do Not Disturb options make turning off notifications and distractions easier than ever, with a new Do Not Disturb at Bedtime feature cutting down on nighttime interruptions.
Group Notifications make notifications easier to view and manage, while a new Instant Tuning feature lets you tweak your notification settings on a notification-by-notification basis.
Apple News has a new Browse feature, the Stocks app has been redesigned, iBooks has been overhauled with a new look and a new name