iOS 11.1 (build 15B5078e) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-10-09T17:02:24Z. The update package is 124.79 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: c26be0ac3232688731ebf00df0be3cb50e4bf40f.zip.