iPadOS 8.1 (build 12B410) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2014-10-20T17:59:06Z. The update package is 159.05 MB. This is a delta (partial) update that requires 8.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8329e8ea9e420b603d4189a98619a75a4809bda4.zip.