iOS 11.1 (build 15B5078e) is an official Apple over-the-air update for the iPhone 6+, released on 2017-10-09T17:02:22Z. The update package is 124.58 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: 8ec25c387c4d928730c85f0e584a4628bfb53dcc.zip.