iPadOS 12.1 (build 16B5077c) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2018-10-09T17:05:26Z. The update package is 260.28 MB. This is a delta (partial) update that requires 12.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 202a74e9915a099381a0faeed466a680e7e0c8c4.zip.