iPadOS 11.1 (build 15B5078e) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2017-10-09T17:01:56Z. The update package is 117.89 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: 0d1f83aca3b6f0a18da2aec59b2f4c5bc5088778.zip.