iPadOS 11.2.1 (build 15C153) is an official Apple over-the-air update for the iPad Pro 9.7-inch (Cellular), released on 2017-12-13T18:09:38Z. The update package is 55.74 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: 949a34d7c5ae4361b8adc1a22cca6cca18dddc03.zip.