iOS 12.3 (build 16F5148a) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2019-04-29T17:36:03Z. The update package is 120.05 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: 1f9a2cb90926ea862e8ae8954b4a7475e46c908f.zip.