iOS 12.1.1 (build 16C5043b) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-11-07T21:08:53Z. The update package is 410.61 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: 8baf0fd5ec692634d752513d2c90e8ff0b048d7f.zip.