iPadOS 10.2.1 (build 14D27) is an official Apple over-the-air update for the iPad 4 (WiFi), released on 2017-01-12T21:11:48Z. The update package is 20.85 MB. This is a delta (partial) update that requires 10.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 07f7319baa1333028d31164bf5ce319b0a7fc882.zip.