iPadOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPad Pro 9.7-inch (Cellular), released on 2018-12-05T18:08:55Z. The update package is 1.24 GB. 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: da82d502ed0bc82ad8f136e804dec7263a3bd4f0.zip.