iOS 12.0 (build 16A5318d) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-07-03T17:05:35Z. The update package is 1.12 GB. This is a delta (partial) update that requires 11.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: aecc86a2841fc338f983fb02588eead287f306ed.zip.