iPadOS 9.2.1 (build 13D15) is an official Apple over-the-air update for the iPad mini 2 (Cellular), released on 2016-01-19T17:59:29Z. The update package is 286.61 MB. This is a delta (partial) update that requires 9.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6d577a411760d6baddab9c15e8d0baa969a3f6d4.zip.