iOS 12.1 (build 16B5084a) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-10-15T17:03:21Z. The update package is 584.57 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: 4722c44f734960e6b0ae2e1817d2d1f6470aab04.zip.