iPadOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, Cellular), released on 2019-07-16T17:39:26Z. The update package is 132.28 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: 8ebdfbe2b44084614021c1ba7a6a7600836f4956.zip.