iPadOS 12.4 (build 16G5046d) is an official Apple over-the-air update for the iPad mini 2 (WiFi), released on 2019-06-11T17:06:57Z. The update package is 200.21 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: 85dd3084b1a8d393133e0022683073d90420fa93.zip.