iPadOS 12.3 (build 16F5155a) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2019-05-07T17:03:44Z. The update package is 371.97 MB. This is a delta (partial) update that requires 12.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9c2d2411a2ca3852b8a61ba0c9c306345729436f.zip.