iOS 12.1.3 (build 16D5037a) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2019-01-07T18:07:23Z. The update package is 276.6 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: a034a7c5e769c80399f794ba31a0c071194e2df3.zip.