iPadOS 12.3 (build 16F5139e) is an official Apple over-the-air update for the iPad 6 (Cellular), released on 2019-04-22T17:08:24Z. The update package is 399.77 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: 52b6f205b0749b2cbf34101e493c189668de856e.zip.