iPadOS 12.4 (build 16G5069a) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2019-07-09T17:15:49Z. The update package is 280.01 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: f0caba37e90b5d79debb589844e5e1cee0a76730.zip.