iOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2018-09-12T19:10:45Z. The update package is 1.32 GB. This is a delta (partial) update that requires 11.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7bc721031ae857ce39e47bccd5b6be4b2b2e15ce.zip.