iPadOS 12.1.1 (build 16C5050a) is an official Apple over-the-air update for the iPad Pro 3 (11-inch, WiFi), released on 2018-11-15T18:04:44Z. The update package is 129.07 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fa8648e213f8d00c7ba6ed040906b3b532735d2d.zip.