iOS 12.0 (build 16A5362a) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-08-20T17:05:24Z. The update package is 1.21 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: 6a7b1f3f2fb72055c5221918c541401e43222a25.zip.