iPadOS 9.2.1 (build 13D15) is an official Apple over-the-air update for the iPad mini (WiFi), released on 2016-01-19T17:59:03Z. The update package is 184.1 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: f0db8e43ac8bf15f4c19be9cda945bccadbb5777.zip.