iPadOS 9.2.1 (build 13D15) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2016-01-19T17:59:36Z. The update package is 260.34 MB. This is a delta (partial) update that requires 9.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e7ee7286f460cb416380d46a5c2afff57607e7da.zip.