iOS 9.9.13.4 (build 17E255) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2020-03-18T17:22:00Z. The update package is 2.9 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: eb801f3bc7779f918e84fbf9b6dd015c73235bc4.zip.