iOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2019-01-22T18:08:43Z. The update package is 532.85 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c8c5acc1edc595d07d726397fe742d594b08386b.zip.