iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2018-12-05T18:11:50Z. The update package is 378.6 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: c5ae5fb638d7cc270134a0d618a80b6670f0a0bf.zip.