iPadOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2018-12-05T18:08:08Z. The update package is 1.27 GB. This is a delta (partial) update that requires 11.0.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 41024b671145bc169cdb3b685d0caa0b7a2ec1e1.zip.