iPadOS 12.4 (build 16G5027g) is an official Apple over-the-air update for the iPad mini 3 (WiFi), released on 2019-05-15T17:04:53Z. The update package is 205.28 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: f3272c6ace58d606bf4cabc6d61965865913b4ad.zip.