iPadOS 12.1.1 (build 16C5050a) is an official Apple over-the-air update for the iPad Pro (10.5-inch, Cellular), released on 2018-11-15T18:04:42Z. The update package is 68.51 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4b0b6e6be1c124e36e4a78c0eb42674e6a26e6e5.zip.