iPadOS 8.1.1 (build 12B435) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2014-11-17T18:06:06Z. The update package is 430.05 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: 142a86429eadfb2c69ad50118158f12cb3946774.zip.