iPadOS 12.4 (build 16G5046d) is an official Apple over-the-air update for the iPad Air 3 (Cellular), released on 2019-06-11T17:06:54Z. The update package is 244.01 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: 86b914e81c3072d32fb413a25108e4f32d21997a.zip.