iOS 11.1.2 (build 15B202) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-11-16T21:20:32Z. The update package is 1.12 GB. This is a delta (partial) update that requires 10.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5225d98a1f57bd3c95d7bb7e174c895ae14f72e6.zip.