iPadOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, WiFi), released on 2018-12-05T18:09:17Z. The update package is 1.34 GB. This is a delta (partial) update that requires 11.2.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3bc11d0f6fcbb9847af6a2972e13a8aa6708e00f.zip.