Apple today seeded a new batch of beta software to developers, bringing up the second beta for iOS 11.4, tvOS 11.4 and watchOS 4.3.1.
Each of the updates included in the list comes along new features and under-the-hood improvements mostly. iOS 11.4 Beta 2 brings AirPlay 2 and Messages on iCloud (which were pulled from iOS 11.3) back, while the second beta of tvOS 11.4 adds only the former. Apple has also notified developers that it may soon drop support for watchOS 1 apps. This is all we know so far regarding the second beta build of iOS 11.4, tvOS 11.4 and watchOS 4.3.1.
Registered Apple developers can grab the firmware IPSW from Apple Developer Center, or can download and install the update over-the-air, provided they have the previous beta builds installed. In addition, the company has also released the public beta firmware for beta testers.