iOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-10-23T17:07:55Z. The update package is 242.05 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: 7bb1df70d0c940c42e03539f0acdb607d6863f72.zip.