A day after seeding the first developer betas of iOS 26.2 and iPadOS 26.2, Apple has stopped signing it for the iPhone Air, iPhone 16e, and cellular models of the new M5 iPad Pro, preventing those devices from installing the update.

The exact reason for the change is unknown, but all three devices use either the C1 or C1X modem, Apple's new custom cellular chips, so it's possible Apple has identified a specific bug related to iOS 26.2 and iPadOS 26.2 with that chip and is preventing users who have yet to update from being affected by it.

The updates will continue to show for users on those devices enrolled in the iOS 26 and iPadOS 26 developer beta programs, but the updates will now fail to install.

It's unknown how long it will take for Apple to address whatever issue it has discovered, at which time we should see revised developer betas for these C1 and C1X devices.

Update: Creative Strategies analyst Max Weinbach notes that his ‌iPad Pro‌ experienced an issue with the update that forced his device into recovery mode, where he was able to restore it to iPadOS 26.1.

Source: Macrumors