iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone 7 Plus (Global), released on 2018-12-05T18:11:39Z. The update package is 381.76 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: db008f28dbb770804a8d4c283d988715ef013114.zip.