iOS 12.4 (build 16G5038d) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2019-05-28T17:07:38Z. The update package is 258.05 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: 6a57c0120c7f5bb65a6793fe67fb7b062dcf8a37.zip.