iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2018-12-05T18:11:56Z. The update package is 1.49 GB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 20df56a3142c90ad51502763491bd83889bfc692.zip.