iPadOS 12.4 (build 16G5056d) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2019-06-24T17:16:53Z. The update package is 282.71 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: 6d0044b0dd19534c963e83196732a3126b4b39bf.zip.