iPadOS 8.1.2 (build 12B440) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2014-12-09T17:49:03Z. The update package is 429.51 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: 5c0940313723495499d6d8da14769332416865f2.zip.