iPadOS 12.4 (build 16G5038d) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2019-05-28T17:07:08Z. The update package is 197.07 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fcc9e9ec2e34c41dde2c37f9a8ca2f9843b74291.zip.