iOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2018-10-30T17:18:06Z. The update package is 1.55 GB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ec131b82d113f3936903f4a347dd8f67eca315b9.zip.