iPadOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2017-10-23T17:01:11Z. The update package is 159.52 MB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: acffe49067a82c29d4a0a61f892a6c29ca28c773.zip.