iOS 9.9.15.4.1 (build 19E6258) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2022-03-31T17:14:08Z. The update package is 4.12 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: a2cb8672aa4374ed7017d20e30a5abb014117892.zip.