iOS 12.3 (build 16F5148a) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2019-04-29T17:36:21Z. The update package is 454.46 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: 3ddfe214098b48585ea396568ef07abaeb2f386a.zip.