iPadOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2017-11-09T18:07:16Z. The update package is 164.28 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: 146c5286a8629df8518287282ca992dddb48b81c.zip.