iPadOS 12.4 (build 16G5027i) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, Cellular, 1TB Model), released on 2019-05-20T17:07:09Z. The update package is 271.54 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: 13d80129224006f8c95578f2afb7cdbd17a9a288.zip.