iOS 12.1.1 (build 16C5050a) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-11-15T18:04:50Z. The update package is 409.49 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: 4826edb02f596bb469de4d2e8f2f9248fd4c8b0e.zip.