iOS 12.1 (build 16B5084a) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-10-15T17:03:20Z. The update package is 191.52 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: f1d27d177be1b2d8dfbfbc289e451decea45322a.zip.