iPadOS 12.3 (build 16F5156a) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2019-05-10T17:08:30Z. The update package is 46.41 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: 94bf2a6ea3bb2e9d91f669a2dd1f32faf833b0bb.zip.