iOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPhone 6, released on 2017-11-09T18:10:42Z. The update package is 40.4 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: 8db716b1d7c7f24795dd459befebfa5401c03589.zip.