iPadOS 12.3 (build 16F5155a) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2019-05-07T17:03:35Z. The update package is 55.58 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: bd8ebc7e112158cfb316b4da2bc6d38044640da4.zip.