iPadOS 11.2.1 (build 15C153) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, WiFi), released on 2017-12-13T18:10:14Z. The update package is 345.5 MB. This is a delta (partial) update that requires 11.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 96e9bf224ea006cbdd7a297fc1934b25fb8a136c.zip.