iPadOS 8.1 (build 12B410) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2014-10-20T17:59:06Z. The update package is 97 MB. This is a delta (partial) update that requires 8.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2004ba41c718e0cae390b30aaffbf3b94d1a7973.zip.