iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2019-01-22T18:05:44Z. The update package is 308.8 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: b20b0a9d20ee3133429f926b9fc79a22dbcf78d2.zip.