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 269.32 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: 89b93bd30fae7caf9ebd6dd5132424c3ae5e7e50.zip.