iOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2019-01-22T18:08:38Z. The update package is 1.6 GB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a2f889f393d803b32eadc63c21726acc1f3ab20a.zip.