iOS 12.3 (build 16F5139e) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2019-04-22T17:09:04Z. The update package is 453.03 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: 9201af5ccd1ec0673296add05020afbe40070f29.zip.