iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2015-08-13T18:05:09Z. The update package is 1.22 GB. This is a delta (partial) update that requires 7.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a2526757c457967254b0fb9ca451372f91e4125c.zip.