iOS 11.0 (build 15A372) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-09-12T19:10:34Z. The update package is 1.2 GB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 31f06607817a604d5252fb76e8d1a57e1efed850.zip.