iPadOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2019-04-08T17:04:12Z. The update package is 294.42 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: 259e300aaf762333b83eafe2e05e9fc42cbdc3d1.zip.