iOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2017-10-23T17:08:47Z. The update package is 33.15 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: f28635b4cc9e6cd3ebd26a43ed646b0c729b3c8b.zip.