iOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2017-11-09T18:12:11Z. The update package is 43.15 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: 1b76fc32005fc470afabfde1ff5bb645b1c23ffc.zip.