
Apple today seeded the first beta of an upcoming iOS 11.4.1 update to developers, one day after releasing iOS 11.4, an update that introduced AirPlay 2 and Messages in iCloud.
Registered developers can download the new iOS 11.4.1 beta from Apple's Developer Center or over-the-air once the proper configuration profile has been installed from the Developer Center.

We don't know what new features are included in the iOS 11.4.1 beta, but it is likely to focus on bug fixes and performance improvements to address issues discovered since the release of iOS 11.4.
Apple's work on iOS 11 is wrapping up, as iOS 12 is set to be released to developers next week following the keynote event of the 2018 Worldwide Developers Conference.
Article Link: Apple Seeds First Beta of iOS 11.4.1 to Developers