iPadOS 11.1 (build 15B5078e) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2017-10-09T17:02:10Z. The update package is 122.7 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: 8437bf69767663e1ecd58fbd19275f4bb1bfd479.zip.