iOS 9.9.13.3.1 (build 17D5050a) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2020-01-22T18:07:22Z. The update package is 2.82 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5b44586be63b96168b751c78bb1580b889902c76.zip.