iPadOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2017-10-23T17:04:28Z. The update package is 30.27 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: 70e8cd35921820c0150dd0482cecc52ee13f9e16.zip.