iPadOS 12.3 (build 16F5155a) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2019-05-07T17:03:49Z. The update package is 63.29 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: 9f0cb3afa65ce69186df175c91d718fb7f7278f5.zip.