iOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2019-04-08T17:04:55Z. The update package is 453.42 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: 4909ddd7bbc782951a830ad90e4f1bf401843064.zip.