iOS 12.0 (build 16A5354b) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2018-08-13T17:03:56Z. The update package is 281.39 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 71e698758d3dbeeceebf6e024f7dd8f719784ae5.zip.