iOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPhone 6+, released on 2017-11-09T18:10:20Z. The update package is 241.69 MB. This is a delta (partial) update that requires 11.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3f215131be700113bb6e2aec7a8c43ffb30f2440.zip.