iPadOS 8.1.1 (build 12B435) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2014-11-17T18:06:05Z. The update package is 1.36 GB. This is a delta (partial) update that requires 7.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9bbe7a00933c310b7cc0dd558370b12378100104.zip.