Apple released the second developer beta for iOS 11.4.1 on Monday, June 11. The company seeded the update 12 days after the release of the first 11.4.1 beta on May 30. The initial beta brought no new features to iOS 11, just bug fixes and stability updates, and beta 2 appears to be the same case.
With each year that we anxiously await Apple's next big version of iOS, there comes the sad reality that the eldest iPhones will not continue to receive support. That's not the case with iOS 12, however, as the software will be compatible with all iPhones currently running iOS 11, going back as far as the iPhone 5S.