iOS 12.1 (build 16B5084a) is an official Apple over-the-air update for the iPhone 6+, released on 2018-10-15T17:03:29Z. The update package is 171.99 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: 5afd720c2766981e30c5722b5b5ddbd1f345b7dd.zip.