iPadOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2017-10-23T17:04:44Z. The update package is 163.52 MB. This is a delta (partial) update that requires 11.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f8412c59e0ab2f2d3cf8f8cd11e56d99ed8028da.zip.