iPadOS 12.3 (build 16F5148a) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2019-04-29T17:35:34Z. The update package is 371.85 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: 9aaea1610d56f1363c27d8c012ebc9527708dd36.zip.