iOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPhone 6+, released on 2018-10-30T17:16:48Z. The update package is 372.09 MB. This is a delta (partial) update that requires 12.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4b4a072b94b6839087ecff32a8c863c41268cb97.zip.