iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2018-12-05T18:09:49Z. The update package is 1.55 GB. This is a delta (partial) update that requires 11.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ad62c59446f7db86913f4285523785fbc824c2a9.zip.