iPadOS 9.9.10.2.1 (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 1.1 GB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: dcf23d7c20357523b1785f827088eea6b96c3433.zip.