iPadOS 12.1.1 (build 16C5036c) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2018-10-31T17:03:46Z. The update package is 321.3 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: 00a860f164ebae150dbc617f0be8139969b1c47d.zip.