iOS 13.3.1 (build 17D5044a) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2020-01-14T18:21:14Z. The update package is 155.65 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a851dae9b9c62acb33d09bd8605cf68600e887b9.zip.