iPadOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2018-09-12T19:07:35Z. The update package is 1.22 GB. This is a delta (partial) update that requires 11.2.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 41b45d14cff437153448c67553aa8f6a5cbd834d.zip.