iPadOS 12.1 (build 16B5059d) is an official Apple over-the-air update for the iPad Pro (10.5-inch, Cellular), released on 2018-09-18T17:20:14Z. The update package is 355.06 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 054211c24e289ed929faa153102d96c50c7141c0.zip.