iPadOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2018-12-05T18:09:07Z. The update package is 1.28 GB. This is a delta (partial) update that requires 11.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0451b427ff3813d8ae2f0ff071d82f24fc362a84.zip.