iOS 12.1 (build 16B5068i) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-10-02T17:11:59Z. The update package is 314.56 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: ad65837ee9ad955abd28ade70fd6d02d22d36cf7.zip.