iPadOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPad 5 (WiFi), released on 2017-10-23T17:04:54Z. The update package is 30.03 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: 1ab198402d3d2f4535d6d9c9edf78fe150f0159b.zip.