iOS 11.1.2 (build 15B202) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2017-11-16T21:20:52Z. The update package is 1.06 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 901c40a90ae32faba35c71ff31914cae509a2b2b.zip.