iOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2019-01-22T18:08:45Z. The update package is 283.86 MB. This is a delta (partial) update that requires 12.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 64e010efc268fceabd6c9eb2f7b389ca3d0015b5.zip.