iOS 12.0 (build 16A5308e) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-06-19T17:04:51Z. The update package is 1.15 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: baf3f02a08806074045449122309f7c632d62251.zip.