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 1.34 GB. This is a delta (partial) update that requires 7.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4cc8c125c41e703bfc26678b36bd3e7b9d8bc0fe.zip.