iPadOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPad 6 (Cellular), released on 2019-04-08T17:04:34Z. The update package is 386.81 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: 592e9d281497fab0c2f0c5c21dd3063598321b0b.zip.