iPadOS 10.2.1 (build 14D27) is an official Apple over-the-air update for the iPad 4 (WiFi), released on 2017-01-23T18:07:14Z. The update package is 841.42 MB. This is a delta (partial) update that requires 9.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c60cf347fc1ef70c2ab87ca5df3d5b9aaa673327.zip.