iPadOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2017-11-09T18:07:42Z. The update package is 39.25 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b17d0f079a881452dae36f1759903715415013be.zip.