iOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2017-10-23T17:06:01Z. The update package is 308.48 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: 028d5cbf28c46e75191370f118940ea9cc581a31.zip.