iOS 11.0 (build 15A372) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-09-12T19:10:35Z. The update package is 1.13 GB. This is a delta (partial) update that requires 10.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4afe1a5e81b01d87a30aeabfb8c0368863ae3029.zip.