iPadOS 11.1 (build 15B5086a) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2017-10-16T17:04:00Z. The update package is 110.2 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c962d07644a0a67d8a17449d9d92047b7cd00f22.zip.