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 2017-12-13T18:10:23Z. The update package is 514.36 MB. This is a delta (partial) update that requires 11.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c32e57d6fe267a2e38285055e0f45e458aeae1c9.zip.