iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2018-12-05T18:11:57Z. The update package is 503.27 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: cc4f10f014ff8661fb7a74fdeb6daf11c2390370.zip.