iOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2019-01-22T18:14:30Z. The update package is 1.53 GB. This is a delta (partial) update that requires 11.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ec2228c431eb652a6bea9620f1192d3ca79e76f0.zip.