iPadOS 9.2.1 (build 13D15) is an official Apple over-the-air update for the iPad 4 (Global), released on 2016-01-19T17:59:17Z. The update package is 1009.64 MB. This is a delta (partial) update that requires 8.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2c7a154d91a73db63730bc47b71c7e92f400e013.zip.