iOS 9.9.11.4.1 (build 15G5063b) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-06-11T17:21:54Z. The update package is 1.91 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: 92f07e698dfc475037d9a7b8bdfffe1ff3ad4391.zip.