iPadOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2017-10-23T17:01:28Z. The update package is 1.05 GB. This is a delta (partial) update that requires 10.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 224765c6693eef6ff99fce6d59ce42fa803a144b.zip.