After a week of iOS 12 beta 3, Apple released the fourth beta of iOS 12 for developers along with the tvOS 12 beta 4 and watchOS 5 beta 4.
Apple added many improvements with some new features like maps, wallpaper and more. iOS 12 beta 4 is even better, smoother and faster than the previous beta.
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Downloading and Installing iOS 12 beta 4
iOS 12 beta 4 is available for download to the registered developer’s via OTA over-the-air from iOS settings app running the previous beta or you can also download iOS 12 Beta 4 through Apple’s online developer center and Apple Beta SoftwareProgram whereas iOS 12 Public beta 4 will be available soon.
tvOS 12 beta 3
tvOS 12 beta 4 is available for download from Settings → System → Software Updates → Update Software.
watchOS 5 beta 4
watchOS 5 beta 4 is available for download with the Watch app on your iPhone by tapping My Watch → General → Software Update or by installing watchOS profile from the Apple developer program.