iPadOS 12.4 (build 16G5056d) is an official Apple over-the-air update for the iPad Air 3 (Cellular), released on 2019-06-24T17:16:46Z. The update package is 218.04 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: 22a54d4537ef7569f6e4e4c2491cc4e609efd717.zip.