iOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2019-01-22T18:14:34Z. The update package is 515.03 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: 5eb93658d1fe22f00b1286d489e9bde5bda69950.zip.