iOS 12.0 (build 16A5327f) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-07-17T17:06:12Z. The update package is 1.17 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: 809c744f3911be8ce9a300ff6b50fef225feab5b.zip.