iOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-10-23T17:06:25Z. 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: ea9dc2ef92d2b7671b28a10184256b2ef16f1c1b.zip.