iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2015-08-13T18:05:09Z. The update package is 402.92 MB. This is a delta (partial) update that requires 8.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 31284943418d9e2426d85dde24cd4b309771dbc5.zip.