iOS 12.3 (build 16F5117h) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2019-03-27T17:06:20Z. The update package is 401.39 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: ff729baa8e92c6cca2cc02b015fd1e7d2d4a23d3.zip.