iOS 12.0 (build 16A5345f) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-08-06T17:06:26Z. The update package is 1.2 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: 8cc7688c1f92696ca4b58967801e9ad478f393e2.zip.