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 287.77 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: d12e8685309bd0646a3397de63e71788fbc7bb10.zip.