iPadOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPad Pro 9.7-inch (Cellular), released on 2018-12-05T18:08:59Z. The update package is 367.87 MB. This is a delta (partial) update that requires 12.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 410403a328f8f3a51e05fb160299a2def69866de.zip.