iPadOS 12.1 (build 16B5077c) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2018-10-09T17:05:25Z. The update package is 355.28 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bc0a249c1ccba4ab5f45e71a4c98b75e7bdbb977.zip.