Additionally, Apple has unsigned iOS 18.4 beta 1 for a number of iOS devices, including most of the iPhone 12 lineup, a few iPad models released in 2020, and cellular versions of the most recent iPad Air model. It’s unclear what exactly the issue is here, but a number of users reported boot looping. Here’s a full list of pulled models:

Apple has started a new round of developer betas, complete with fresh builds of iOS 18.4, iPadOS 18.4, macOS 15.4, tvOS 18.4, watchOS 11.4, and visionOS 2.4 that will ultimately deliver Apple Intelligence to the headset.