iPadOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2018-12-05T18:08:18Z. The update package is 378.35 MB. This is a delta (partial) update that requires 12.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6380307220113ccc4f79d35e5945a9227a3c0fd3.zip.