iPadOS 12.3 (build 16F5139e) is an official Apple over-the-air update for the iPad Air 3 (WiFi), released on 2019-04-22T17:07:42Z. The update package is 358.73 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: 5346208010afe6b97deb89dc9544869b8c4fc745.zip.