iPadOS 12.4 (build 16G5069a) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2019-07-09T17:15:45Z. The update package is 278.72 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: b186c0200432180b1be37aa5114be7062b9ad2e1.zip.