iPadOS 12.1.1 (build 16C5043b) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2018-11-07T21:08:39Z. The update package is 323.32 MB. This is a delta (partial) update that requires 12.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8ee73a59e0ed9a414537a2c894cc0b0c1f0a37aa.zip.