iOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-10-23T17:06:26Z. The update package is 234.66 MB. This is a delta (partial) update that requires 11.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3a28b0e97170813572896840c75cf0777a9c4402.zip.