iPadOS 12.4 (build 16G5038d) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, Cellular), released on 2019-05-28T17:07:33Z. The update package is 262.34 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: 68c3eb5110de3489fb573628ad1965f6186541f1.zip.