iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2015-08-13T18:05:10Z. The update package is 388.15 MB. This is a delta (partial) update that requires 8.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0f03132ef2af2ad9a676b50358573ab161e7d1f3.zip.