iOS 12.3 (build 16F5139e) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2019-04-22T17:08:50Z. The update package is 409.78 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: e2681ef50191e5b6758c64b1cebfad15226fe0a7.zip.