iPadOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2019-04-08T17:03:54Z. The update package is 333.71 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: b70fbd775f83511a3c38db5c6c9bccc42fc7f043.zip.