iOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPhone SE, released on 2017-11-09T18:11:22Z. The update package is 235.49 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: 4c008dc7f6001431dd8764c542a6ea9eee18a274.zip.