iPadOS 12.1 (build 16B5089b) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2018-10-22T17:01:42Z. The update package is 140.4 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: aa2a01e4aa2e14465a7f00c2d28e1fdd244d7135.zip.