iPadOS 12.3 (build 16F5155a) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2019-05-07T17:03:48Z. The update package is 371.89 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: 2d51c808952098818cfb9549d5d21cde18015053.zip.