iOS 11.1 (build 15B5078e) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2017-10-09T17:02:27Z. The update package is 147.64 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fdf36eae6b610f657f38c1ee4c77b4d66efe73b0.zip.