iPadOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPad Air 3 (Cellular), released on 2019-07-16T17:38:55Z. The update package is 127.63 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: 5e0dd7b61ba00a279e3eb60fc375bebb0a4697a1.zip.