iPadOS 12.4 (build 16G5056d) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2019-06-24T17:16:55Z. The update package is 284.01 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 34d9cfb1888b4049de99c68b625b79c755ec0c95.zip.