iOS 13.3.1 (build 17D5050a) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2020-01-22T18:07:31Z. The update package is 166.42 MB. This is a delta (partial) update that requires 13.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4d25087c22ec242acab5f27a976044b06854c1bb.zip.