iOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2019-01-22T18:14:37Z. The update package is 267.31 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6e8f494a16d67f2b6594c50a9985cf9b25a826ce.zip.