iPadOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2017-10-23T17:04:26Z. The update package is 1.02 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 489d9cdc8830cf60cd91e0c69878bbbcba2b9cb1.zip.