iOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-11-09T18:09:29Z. The update package is 234.82 MB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2731371d5bebf2cb8f5ec2af9148da79d1577cc5.zip.