iPadOS 10.2.1 (build 14D27) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2017-01-23T18:07:54Z. The update package is 310.04 MB. This is a delta (partial) update that requires 10.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d6e662493b7c741b6e6f360485f3b4fbe3d91716.zip.