iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-12-05T18:10:05Z. The update package is 525.59 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b4b05e228163e42673f96c937614b2f302c74d6c.zip.