iPadOS 12.4 (build 16G5027i) is an official Apple over-the-air update for the iPad Air 3 (Cellular), released on 2019-05-20T17:06:37Z. The update package is 267.54 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: 08f23c7d31522721b6e3b418484a5daee9a3c7df.zip.