iPadOS 11.2.1 (build 15C153) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2017-12-13T18:09:53Z. The update package is 55.71 MB. This is a delta (partial) update that requires 11.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d2a2abf6826c2fe213e5d0f7e986eb7aa5f90bd6.zip.