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Apple has released a second version of the iOS 15.6 and iPadOS 15.6 Release Candidate developer beta with only a slight build number bump.
The new builds of the operating systems can be downloaded via the Apple Developer Center for those enrolled in the test program, or via an over-the-air update on devices running the beta software. Public betas typically arrive within a few days of the developer versions, via the Apple Beta Software Program website.
The first Release Candidate beta arrived on July 12. The second Release Candidate beta is only a slight build number jump from 19G69 to 19G71.
The betas primarily consist of bug fix and performance improvement releases, instead of providing new features. Since Apple is also testing betas for iOS 16, iPadOS 16, tvOS 16, and watchOS 9, it's not likely that any new features will arrive in sooner-to-arrive release betas.
AppleInsider, and Apple itself, strongly advise users avoid installing beta software on to "mission-critical" or primary devices, due to the small possibility of data loss or other issues. Instead, testers should install betas onto secondary or non-essential devices, and to ensure there are sufficient backups of important data before updating in the first place.