iOS 13.3.1 (build 17D5044a) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2020-01-14T18:21:17Z. The update package is 158.03 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: d1fe8f0682ff46e6ac2fc21801fdff6cf2a356a7.zip.