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 2017-12-13T18:10:09Z. The update package is 1.19 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 35ef78cdfa801ed05569fe99f962f15526ab2245.zip.