iOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2017-11-09T18:09:08Z. The update package is 51.01 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: 26dd66fb3de6a495ab3a2f61b6fcc6439100344e.zip.