iPadOS 11.1 (build 15B5086a) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2017-10-16T17:03:52Z. The update package is 83.71 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: 27e528450a8867694ab958931439334094a4849e.zip.