iPadOS 12.4 (build 16G5027g) is an official Apple over-the-air update for the iPad Pro 3 (11-inch, Cellular, 1TB Model), released on 2019-05-15T17:05:32Z. The update package is 271.42 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: e3c556a52edc0fb7ed74f08fcc86a4b8d2d68378.zip.