iOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2019-01-22T18:14:22Z. The update package is 266.64 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 99f4523c2ac24bfb03d1fe4991869b2e34d537f6.zip.