iOS 12.1 (build 16B5089b) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2018-10-22T17:02:11Z. The update package is 166.68 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: 46112b020832ac80ee9477c091111fcee0d1d409.zip.