iPadOS 12.4 (build 16G5038d) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2019-05-28T17:07:11Z. The update package is 226.26 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fc18ebb8a25a13ec6285d904da47ea6f3d56d41c.zip.