Apple seeded the fourth beta of an upcoming iOS 11.4.1 update to developers and public beta testers, one week after seeding the third beta and a month 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. Public beta testers can also install the update over-the-air with the public beta profile. 


No new features were discovered in the first three iOS 11.4.1 betas, suggesting it focuses on bug fixes and performance improvements to address issues discovered since the release of iOS 11.4. 

We'll update this post should we discover any new features in the fourth iOS 11.4.1 beta, but we're not expecting major changes now that Apple has shifted its focus to iOS 12, which is also available to developers for beta testing purposes. 

Source: macrumors