iOS 11.0.3 (build 15A432) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-10-11T17:08:08Z. The update package is 1.16 GB. This is a delta (partial) update that requires 10.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 112aa801695187f6eef15317c97139eea2d6272d.zip.