iOS 12.1.1 (build 16C5036c) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-10-31T17:03:56Z. The update package is 410.23 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: a0394a880b2d95511afb7950bde03273bd8a69d5.zip.