iPadOS 12.4 (build 16G5027g) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2019-05-15T17:04:58Z. The update package is 206.59 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: f17d11eaa0788a0c001850cc00cc8de184f64168.zip.