iPadOS 12.4 (build 16G5038d) is an official Apple over-the-air update for the iPad Air 3 (Cellular), released on 2019-05-28T17:06:58Z. The update package is 259.27 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1187b889820e0bfa14d1a933e03920d22f506905.zip.