iOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2017-11-09T18:09:05Z. The update package is 51.13 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: 16b85e5d45ed2dcf9a821d04023aaae4ae2595ce.zip.