iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone 6+, released on 2018-12-05T18:10:26Z. The update package is 1.86 GB. This is a delta (partial) update that requires 10.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fa02ccbe221b7de4bfa32e2d4b2fbb435ed810c5.zip.