iPadOS 11.2.1 (build 15C153) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, Cellular), released on 2017-12-13T18:10:28Z. The update package is 345.4 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 79afc8ef632a641784f5df89b3ceb1ddae32a1e4.zip.