iPadOS 9.2.1 (build 13D15) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2016-01-19T17:59:37Z. The update package is 1.04 GB. This is a delta (partial) update that requires 8.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ef657fc957c95b077270e1c8fd59793f70a9fac9.zip.