iOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2019-04-08T17:05:16Z. The update package is 323.14 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: c0a1f6f0b928f9998d90bdb67dbf4f1c744a1b30.zip.