iOS 12.1 (build 16B5084a) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2018-10-15T17:03:42Z. The update package is 550.89 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: a3faa7acbdb5f0f077e8e8f61e6697fa1ea13927.zip.