iOS 12.3 (build 16F5117h) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2019-03-27T17:06:29Z. The update package is 374.73 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: 3dd6319c30a2da42f35cf5b6f5a8cada3ac03835.zip.