iPadOS 12.2 (build 16E5227a) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2019-03-18T17:06:28Z. The update package is 651.02 MB. This is a delta (partial) update that requires 12.1.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 060f5d1130920b9fb25568a70a534ec072b1acc6.zip.