iOS 12.1 (build 16B5059d) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2018-09-18T17:20:20Z. The update package is 402.26 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: e95eab4f4d4a80977f7bd3c906bd57985ec27f4e.zip.