iOS 12.1.1 (build 16C5036c) is an official Apple over-the-air update for the iPhone 6+, released on 2018-10-31T17:04:01Z. The update package is 299.17 MB. This is a delta (partial) update that requires 12.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 29081ab21a020575671699b711bec4bf8b822f26.zip.