iPadOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPad Air 3 (Cellular), released on 2019-04-08T17:03:53Z. The update package is 322.21 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: fa9da22864e89d87de42b397925fd0a1f2b3ca3a.zip.