iOS 12.1 (build 16B5077c) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2018-10-09T17:05:55Z. The update package is 416.42 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bd275f7634effb977c12f950ba481294129cf3dc.zip.