iPadOS 12.3 (build 16F5148a) is an official Apple over-the-air update for the iPad 5 (Cellular), released on 2019-04-29T17:35:40Z. The update package is 383.29 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: 84f03cfb96fb1946d1f49adb65fbb4f48e93ae42.zip.