iOS 11.1 (build 15B5086a) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-10-16T17:04:21Z. The update package is 129.93 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: 8fd12b280471195c22bc5a38853c24182af971e2.zip.