iOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2017-11-09T18:09:06Z. The update package is 314.44 MB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c744a2d02b16d8a3ba32756560d84f740f2bfa6d.zip.