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 173.65 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: 043f276ac17fbc6fe6acccd511a62f7a2e018bd6.zip.