iOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2019-01-22T18:14:35Z. The update package is 510.32 MB. This is a delta (partial) update that requires 12.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: dded1e6bfb69cbc7fd1253a18bcae306c3b3d1c2.zip.