iOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2017-11-09T18:09:56Z. The update package is 234.5 MB. This is a delta (partial) update that requires 11.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4743eece49e11825319313dc172512f072344ffb.zip.